Ronda Caliber 515 24h

Ronda Caliber 515.24H

Ronda Caliber 515 24h

Brand Ronda
Caliber Number 515.24H, 515H
Base Caliber 515
Line Powertech 500
Type Quartz
Lignes 11 1/2”’
Diameter
26mm
Case Diameter 25.60mm
Height
3mm thick
Jewels
1
Battery Cell
371
Hands 1.20mm / .70mm / .20mm / 1.60mm
Battery Life ~45 months
Accuracy
-10/+20 seconds per month
Hacking? Yes
Functions Hours, minutes, central seconds, date at 3:00, central GMT hand (second time zone)
Country
Swiss Made or Swiss Parts
Known Models
Lum-Tec Combat B33, Shinola Rambler GMT, Rotary Henley GMT, Luminox SXC Space GMT, Elliot Brown Beachmaster GMT, Inventic A3 Aero GMT (Add your watch in the comments below)

This is the Ronda caliber 515.24H (24H for 24 hours) which is basically a caliber 515 with an added GMT complication. It is a Swiss made or Swiss parts quartz movement. This caliber is also sometimes written as 515H.

In Ronda’s own words:

“Affordable metal movements for reliable quality watches.” -Ronda

This caliber features:

  • Repairable metal watch movement
  • Power saving mechanism with pulled out stem: Reduction of consumption approximately 70%
  • Interchangeability: All versions 11½”’ with same movement height 3.00 mm and stem height 1.50 mm
  • Very powerful stepping motor

*Pulled out stem refers to pulling the stem in time setting mode, not removing the stem completely from the watch.

Ronda caliber 515.24H quartz movement

Swiss Made VS Swiss Parts:

There are several caliber 515 based quartz movements by Ronda. There are Swiss Made and Swiss Parts versions available. Both are nickel plated metal, both have 1 jewel. Ronda documentation claims an accuracy of -10/+20 seconds per month, regardless of the movement being Swiss Made or Swiss Parts.

Where is the caliber number?

Ronda does not stamp the metal part of this movement with the caliber number, instead, you can find a reference on the outer plastic part of the movement. It is not the full caliber number (515.24H) but the base caliber.

Ronda Caliber 51524h

Ronda Stem Positions:

The better understand time-setting and disassembly instructions, it is important to understand how the manufacturer describes certain states or modes of the watch. According to Ronda, the crown/stem positions are as follows:

  • Position 1 (I) – Position of rest. Crown against the case with the watch running.
  • Position 2 (II) – Crown in date setting mode. In the case of the caliber 515.24H this is also the position for setting the GMT hand.
  • Position 3 (III) – Time setting mode. This position will also hack (stop) the seconds hand which also serves as a power saving mechanism.

Ronda Caliber 515 24h Crown Positions

Stem Removal:

To remove the crown/stem, find the hole with the arrow. While the crown is in position date setting mode (position 2), pressing this with your tweezers or other tool will allow the stem be unlocked so you can pull it out.

Ronda Caliber 515 24h Stem Removal

Changing the battery:

The correct battery cell for the 515.24H is number 371. Ronda claims that the battery should last up to 45 months. To remove the battery, there is a metal locking mechanism that uses tension to hold it into place. Gently put your tweezers or other tool in the hole and slide it over – not too hard and not too far. The battery will pop out like in this video. Do not remove the screw and do not touch the coil.

The thin orange/brown colored disc or tab below the battery is an insulator. It is necessary to prevent shorting out the battery. If your watch doesn’t work after installing a new battery, it’s possible that the insulator fell out, or the new battery cell could be bad.

As mentioned above the caliber 515.24H has a built-in power saving mechanism. If you are not going to wear your timepiece for an extended period of time, you can pull the crown out to time-setting position to reduce drain on the battery. Keep in mind that this also puts your stem and crown in a vulnerable position, so be careful about how you store your watch with the crown pulled out.

Ronda Caliber 515 24h Battery

Replacement Price:

At the time of this post, replacement prices for the 515.24H were found online in the range of $11.95 – $19.95 USD. It is unclear whether these are Swiss Made or Swiss Parts.

Caliber Commentary:

Scoochy on WUS says:

It’s not too bad, midrange quality quartz. It’s far superior to what ETA has in the same functionality department, the 805.161.

Examples of watches with the 515.24H:

The caliber 515.24H shown below was found in this Rotary Henley GMT watch here.

Ronda Caliber 515 24 In A Watch

Pros and Cons:

Pros

  • Affordable quartz GMT option
  • Long battery life
  • Solid performance
  • Easy to find replacements
  • Easy to replace if needed

Cons:

  • No low battery indicator
  • Coil is uncovered and close to the battery clamp, so it’s easy to slip your tool and hit the coil
  • Needs insulator film below the battery cell to prevent shorting, this film is easy to lose or get damaged from old leaking batteries

Additional Resources:

You are reading Caliber Corner, the world's most popular resource for watch movement pics, specs, mods and DIY repairs. Follow @calibercorner on Twitter, Instagram but NOT Facebook. Subscribe on YouTube. Join our mission to spread movement awareness!

Join the discussion on Ronda Caliber 515.24H?

  • Keep comments respectful and follow our community guidelines.
  • Keep comments on the topic of Ronda Caliber 515.24H

For off topic or general watch questions, post in the Caliber Corner Forum.

guest

65 Comments
oldest
newest most voted
Inline Feedbacks
View all comments
trackback
Shinola Caliber Argonite 515.24H Watch Movement | CaliberCorner.com
5 years ago

[…] Ronda 515.24H […]

Bruce Rezvani
Bruce Rezvani
4 years ago

Hi,
I will be grateful if you could help me with this issue;

I have a Sturmanskie Heritage Arctic GMT 51524-3331816
Product No.: S 51524-3331816

Which is supposed to have a Ronda 515-24 movement. The Date is however is at 4 not at 3. Where can I get this movement movement? is it just the regular 515-24H that I should be looking for??

Many Thanks
Bruce

Danny C.
Danny C.
4 years ago
Reply to  Bruce Rezvani

It looks like they just cut a square in the dial at 4 instead of 3. It’s the same calendar wheel since the date is at a slight angle at 4 and not straight. They probably did it to keep the date out of the way of the compass star design on the dial. You can ask others here, but I say just look for 515.24H cause there’s no such thing as a 515.24H with a different date position.

Bruce Rezvani
Bruce Rezvani
4 years ago
Reply to  Danny C.

Many Many Thanks Danny

Danny C.
Danny C.
4 years ago
Reply to  Bruce Rezvani

You’re welcome, come back to let me know how it goes with the replacement movement.

Alex
Alex
4 years ago

Found in Swiss Military CX GMT. I think that Swiss Military CX is an Invicta property.

Matthew Karwoski
Matthew Karwoski
4 years ago

Terrible durability, sloppy GMT hand movement. Not recommended

LWow
LWow
3 years ago

What was the durability issue you had with this movement and why is the GMT hand sloppy? Can you explain more?

Humberto
Humberto
2 years ago
Reply to  LWow

Have a Mathey-Tissot with this movement. Out of the box GMT hand unreliable (gains time). Has been sent back for repair to maker, and came back no better. Not happy at all.

Humberto
Humberto
2 years ago
Reply to  Humberto

Since then watch returned again, sent a replacement. Looks like the issue was the fitting of the GMT hand (lose, dragged along by the hour hand). Replacement working fine for a week now.

trackback
LÜM-TEC's New Watches - The Truth About WatchesThe Truth About Watches
4 years ago

[…] new 43mm B-Series are powered by a Swiss Ronda 515.24H movement. The $399.50 titanium carbide coated Combat B46’s bound to appeal to the military-minded […]

Kenny
Kenny
3 years ago

Hello, this may seem like a stupid question, but I am somewhat of a novice. Does this movement move at 24 hours rather than the traditional 12 hours?

LWow
LWow
3 years ago
Reply to  Kenny

This movement moves at the traditional 12 hours for the main time and has an additional GMT hand for the second time. The GMT hand moves at 24 hours.

LWow
LWow
3 years ago

Excellent cheap Swiss GMT quartz movement. Can’t beat the value for a cheap GMT.

Nigel Pearce
Nigel Pearce
3 years ago

I have a tauchmeister to 311 1937 1000
Meter dive watch helium valve with ronda
515 24 gmt brilliant 70% save as well only
Let registered craftsmen change they say
Tweezers to change wrong that is mistake

Jorge Robles
Jorge Robles
3 years ago

I have an Invicta Hydromax Reserve watch with this movement for 4 years now and had found no issue at all, and still has original battery it came with. GMT function is working as intended- one rotation per 24 hours, and I have it set for Houston (CST) and Ukraine (CST + 8). Accuracy is very good for this watch’s price- 65.00 USD at a pawn shop.

Joe Shields
Joe Shields
3 years ago

Sweet little movement. Using it to drive my homemade Nav watch installed in an old Silverode Pocket watch case ($30 on eBay). Still trying to figure out how to tie the stem to the Pocket Case Crown. Do they make a universal joint stem adapter? Accurate enough that it can be set and then just bury the stem inside and it keeps good time for at least a week (so far). Gorilla glued the movement to the back of my homemade dial.

navwatch1.jpg
navwatch2.jpg
Joe Shields
Joe Shields
3 years ago
Reply to  calibercorner

No, using the 515.24H with the 24 hour hand with no 12 hour hand installed. Trying to mimic the Hamilton GCT Navigational Watch shown below. Sure I could use my Casio 3054 Radio-controlled Atomic Timekeeping LCD watch, set for Greenwich TZ, for shooting celestial objects with my sextant, but with my old eyes I have a hard time focusing on the LCD screen. I lose a couple seconds tilting it this way and that before I can read it. My homemade dial has all 24 hours labeled and all 60 minutes/seconds labeled so there’s no interpolation (counting hash marks in… Read more »

hamiltonGCT.jpg
Joe Shields
Joe Shields
3 years ago
Reply to  calibercorner

Yes, that would be a nice addition, especially when set to Greenwich time and it’s already the next day there. I’ve made that mistake before. I know… We have GPS now, but celestial navigation is such a cool thing and the history of accurate timekeeping for determining longitude such a great story.

Joe Shields
Joe Shields
3 years ago

What is meant by crown being in 0 position. If pushed all the way in is meant. I disagree. Stem pulled out one click positions the detent to center of hole and is the easiest to press and remove stem. I don’t believe you can remove the stem on a Ronda 515-24H with the stem pushed all the way in. Question — what is the value of 70% power savings running with stem removed? Why would this be a feature? Other question — Is there an easy way to disable date function if not being used? Any improvement in accuracy… Read more »

Joe Shields
Joe Shields
3 years ago
Reply to  calibercorner

oops, should have looked at your updated documentation before answering. That looks PERFECT. Please remove my reply above. Thanks! Great resource!

Joel
Joel
3 years ago

I touched the coil with my tweezers while removing the battery. This seems like “crossing the streams” from Ghostbusters…very bad. The watch isn’t working now, even after swapping out the replacement battery for another new one. Have I killed it?

Fortunately a new movement is
Fortunately a new movement is
3 years ago
Reply to  Joel

Not sure if you got an answer, but my watch guy, the only one I will let change the batteries in my watches, specifically told me about this movement, and that problem. Shorting the watch movement while changing the batteries is a movement killer. Fortunately a new movement is not that expensive.

Robert
Robert
3 years ago

Is there a source for a true 24 hour dial, or a way to print a dial similar to the Hamilton 24 hour pocket watch also on this thread? I would like to put together a watch based on this movement with a dial similar… Thanks for any advice

trackback
Original Grain Pilot Zulu Review: Does it Soar or Plummet?
3 years ago

[…] The Pilot Zulu features a Swiss Ronda 515.24H movement, which is broadly considered to be  an affordable and reliable caliber within the watch community.  […]

Rafael
Rafael
3 years ago

Found in DUFA Weimar GMT DF-9006-0A

jeffrey w hoffman
jeffrey w hoffman
3 years ago

the 515h fail 6months after i got it not real happy with the movement

LWow
LWow
3 years ago

How did it fail?

Phil
Phil
3 years ago

I have a Swiss Military watch with this movement, that stopped keeping time (losing hours a day). Not sure what happened, but I got a replacement off ebay. Unfortunately, the replacement is too large. It’s the standard 11.5 LI, but it looks like the one I need is a 10.5 LI (~23.6mm diameter) which does not seem to be available anywhere. The only difference between the two calibers is the size of the plastic spacer with the holes for the dial, and the date wheel being a little smaller and sitting right up against the base plate of the movement.… Read more »

trackback
New Watch Alert: Halter, BALL, Lüm-Tec - The Truth About Watches
3 years ago

[…] inner ring preserves overall legibility. An anti-shock mounting system (of some sort) protects a Ronda 515.24H movement that’s water resistant to 200M. Bonus! The watch comes with lifetime free battery changes, […]

Steven Lloyd
Steven Lloyd
2 years ago

Hello does the Ronda caliber 515.24h have a low battery indicator or eol? Thanks.

Gerrit Jan Dreijer
Gerrit Jan Dreijer
2 years ago

I have a Botta design UNO24 with only a hand on the GMT axis, and a Torgoen T9 with this caliber.

Gerrit Jan Dreijer
Gerrit Jan Dreijer
11 months ago

…and a Swiss Alpine Military 7052.1132 GMTNever had any problem.

Frank St.Pierre
Frank St.Pierre
2 years ago

Invicta reserve hydromax 16959

trackback
Lüm-Tec Combat B49 24H Review – City Milano News
2 years ago

[…] endlessly symmetrical dial is blessedly date window-less. Only not really. Ronda builds its quartz 515.24H movement with a date wheel. In this application, it’s hides behind the dial, doing nothing […]

Seno
Seno
2 years ago

Hej guys,

Is there a specific way of putting the hands on a GMT model? I am working on a Versace GMT and need to install a new movment.
Tnx

Norman Diaz
Norman Diaz
2 years ago

Add Svalbard 24-hour watches to users of this movement. I have their BA21B model. Ticking away 2 years now and keeping accurate time. (Vendor image shown.)

Svalbard_Isfjell_BA21B_00.jpg
Eric in Arlington
Eric in Arlington
2 years ago

The Phoibos line of Eagle Ray GMT watches use this movement. Good prices for a GMT watch.

hhj
hhj
2 years ago

where can i buy watch hands?
do you konw compatible moldel hands?

Marc Mickowski
Marc Mickowski
1 year ago
Reply to  hhj

I am having the same problem.

JR
JR
2 years ago

Found in the Lum-Tec B37, B41, and B49. Also in the Isobrite ISO3010 and ISO3011. Battery life is as advertised in my experience: 39 to 50 months. I haven’t had any issues with the cal or problems replacing the cell. The movement just plain works.

Jonathan Dicken
Jonathan Dicken
1 year ago

Hello all.

I just purchased a watch with this movement, Amazon

My problem is that the watch is running very fast.

in an hour, it jumps ahead about 3 hours.

I was able to get the case back off, but I didn’t see anything that would allow me to adjust.

Can anyone help?

LBC5000
LBC5000
1 year ago

That’s because there isn’t any way to adjust a quartz movement. You probably didn’t have to take the back off to see that since there are pics on this page but since you got the back off you can try to put a new battery in. If that doesn’t do the trick then you should try to get them to fix it for you. If not, then you can put a new movement in it yourself.

Jimmy Q
Jimmy Q
1 year ago

invicta 17145 GMT has this movement … a nice looking watch … we shall see it accuracy

trackback
About Vintage 1982 GMT - Travelling through time(zones...) - Romeo's watches
1 year ago

[…] source […]

ray
ray
1 year ago

Hi, would this movement fit into a case designed for ETA2824?Would it fit into any size case, and make it fit with some sort of spacer?

John Garner
John Garner
1 year ago

Does the second hand sweep or clunk in this movement?

Jan Prazak
Jan Prazak
9 months ago
Reply to  John Garner

The second hand simply jumps from one second to another, no smooth movement. I have a Swiss Alpine Military by Grovana with a 515H. The second hand on this watch is even quite a bit off the indexes.

Captain Ron
Captain Ron
11 months ago

Thanks for the tip about the insulator, I have this movement in a luminox navy seal 3000/3900. I cut a circle out of some thin paper and replaced the lost insulator. Working great now.

Teton
Teton
10 months ago

Just got Invicta Hydromax with this movement… Out of the box strange thing happens every night during calendar change time window. The GMT hand would faster during calendar change hours and result in GMT hand running fast about 3 hours. No problem during non calendar change time window.

Rod
Rod
9 months ago

Does Ronda make the 515 24 hour GMT movement with the date at 3 o’clock and the stem at 4 o’clock ?

Scott Sp
Scott Sp
5 months ago

This is very informative and has awesome pictures for us DIYers. I appreciate everything the website is all about. Thanks again.

Ian Jakeway
Ian Jakeway
4 months ago

I have a Jacopo Dondi. Cambio, mono hand 24-hour analog dial watch which is very nice, ‘unique’ and good for days where time telling doesn’t need to be precise (lazy casual days). This has the Swiss-made quartz Ronda 515.24H (the three crown positions are still there and the date advance position still clicks but no date window (which would ruin the clean design). The second position moves the single/mono hand rapidly and the third position is slower for fine adjustment. (Basically the only hand on this watch is the GMT hand used as a single 24 Hr hand). Very nice… Read more »

IMG_6725.jpeg
Steffen Roller
Steffen Roller
3 months ago

I just got the Svalbard Noonday AA17F with one 24h hand which is driven by this movement.

M Peter
M Peter
2 months ago

I have a chinese Addiesdive with this caliber, quartz is functioning as expected.
But for every hour that passes the GMT hand moves only half hour.
I’m (kinda of) ok with this because i dont use the GMT function, but still bothers me sometimes.

Inigo Montoya
Inigo Montoya
1 month ago
Reply to  M Peter

Does that watch not have a 24 hour bezel? The GMT hand should only move halfway between each 1-12 dial marker per hour since it only makes one revolution in 24 hours.
I have definitely seen some AliExpress GMT watches with a mismatched 60 minute bezel.
But Addiesdive seems to have their act together

Seagull Caliber St19

Join our mission to spread movement awareness!

Members Online

  • Pav

Recent Forum Posts

Trending Comments

5

Seiko Caliber 7S26

There reallt ís a "definite" and "safe" answer to this question - that'll serve for…


4

Seiko Caliber 7S26

Which serves as the second hand pointer: the sharp edged-point or the ball-end of the…


4

Seiko Caliber 7S26

Wear your watch with pride, @Kristóf. That magic feeling with - having bought/having had as…


3

Poljot Caliber 2416 “Kosmos”

You can just push the stem with a slightly firm push when it's at the…


3

Seiko Caliber 7S26

Good amplitude makes good average time keeping by the 7s26. Goes for all automatic watch…


Sponsors

65
0
Would love your thoughts, please comment.x
()
x