Ruben And Sons Technosablier Caliber Md3g

Ruben & Sons caliber MD3G

Ruben And Sons Technosablier Caliber Md3g

BrandRuben & Sons (Technosablier)
Caliber NumberMD3G
Base Caliber
Miyota 8215
Movement TypeAutomatic
Linges11 1/2”’
Diameter
26mm
Height5.67mm
Jewels21
Vibrations Per Hour
21,600 bph
Lift Angle
49 degrees
Shock SystemParashock
Power Reserve
40 hours
Winding Direction
Counterclockwise (uni-directional)
HackingNo
Hand-Windable?Yes
Balance Staff039-1020 (Citizen)
Stem065-212, tap 10 (Citizen)
Hands Size
1.52mm / 1.0mm / 0.17mm
FunctionsHours, minutes, central seconds, date at 3:00 or 6:00
Country of ManufactureSwitzerland (unconfirmed)
Known Brands
Gevril Vanderbilt, Gevril Avenue of the Americas, Gevril Washington, Gevril Triton, GV2 Motorcylce Sport (add yours in the comments below…)

The Ruben & Sons caliber MD3G is a 21 jewel automatic movement that is claimed to be Swiss Made but appears to be based on the Japanese Miyota caliber 8215.

Information about Ruben & Sons is virtually non-existent.

From their official website (rubenandsons.ch) which no longer exists:

“Ruben & Sons is one of today’s most innovative and forward thinking watch movement makers. Using a select group of Swiss component makers as well as their own in-house manufacturing capabilities, they create superb, high quality MD3G automatic mechanical movements that are characterized by their superior craftsmanship and creative embellishment and decoration.

By carefully sourcing all components from highly regarded Swiss companies, Ruben & Sons is able to ensure that their high quality standards are maintained throughout the production process. The beautifully finished plates, bridges and rotors on these precision movements add a refined touch of Italian style to these expertly assembled timing tools.

There are a variety of mechanical movements in the Ruben & Sons product family. Watch movements that feature date, day/date and small seconds are available. A beautiful skeletonized movement is also available.”

Ruben & Sons aka Technosablier?

Gevril seems to be the only watch brand that is using the caliber MD3G. Gevril was previously advertising this movement as being the Technosablier caliber MD3G. The relationship between Ruben & Sons and Technosablier is unclear.

From Gevril Group’s site:

“Ruben & Sons MD3G Automatic Watch Movements: Founded by Dr. Massimo Ascari, this small, highly innovative Swiss company manufactures and assembles technically superior automatic mechanical watch movements that are characterized by their superb craftsmanship and unique stylistic refinements.”

Swiss Made Miyota?

Most of the pictures of this caliber online show the movement with the rotor covering the balance wheel which has identifiable Citizen design and parts such as Parashock anti-shock system. You can see it in the video below:

Is it a Miyota Clone?

The MD3G could be called a Miyota 8215 clone if it was made by Ruben & Sons based on the original design of the 8215 (similar to popular ETA 2824-2 clones), but the MD3G is presumably a Miyota manufactured movement that is assembled and fitted with a custom branded rotor in Switzerland. Therefore, the MD3G should not be considered as a Miyota clone.

Accuracy & Power Reserve

Ruben & Sons MD3G is basically a Miyota 8215 and Miyota claims the caliber 8215 has an accuracy rating of -20 ~ +40 seconds per day. This is only measured within 10 to 60 minutes from a full power reserve. To achieve full power reserve, hand-wind the crown 40 times. Power reserve or fully wound running time is about 42 hours.

Hesitating Seconds

Because the Ruben & Sons MD3G is basically a Miyota 8215 and has an indirect-drive system for running the central seconds, it also experiences a stuttering or hesitating second hand. Learn all about it.

Replacement Prices

It appears that the Ruben & Sons caliber MD3G is only sold in fully manufactured timepieces, and cannot be purchased individually. If your Gevril or other watch using the Ruben & Sons MD3G needs parts or repair, it’s likely that the Miyota 8215 is a direct swap, you just won’t have the same branding or PVD finish that some of the MD3G movements have.

Click here to buy a replacement Miyota 8215 movement for your watch.

Examples of watches with caliber MD3G:

Additional Resources:

  • Miyota caliber 8215 caliber listing here
You are reading Caliber Corner, the most popular resource for watch movement pics, specs and opinions, including mods and DIY repairs. CC is a watch geek community for gear turning and caliber learning! Check the front page for the latest caliber listings and follow Caliber Corner on Twitter, Instagram and Facebook. Subscribe to our YouTube channel for close-up movement videos. Join our mission to spread movement awareness. Sign up!
What do you think about Ruben & Sons caliber MD3G? Keep comments respectful and follow our community guidelines.
Subscribe
Notify of
guest
12 Comments
Inline Feedbacks
View all comments
Appalled
Appalled
8 months ago

“By carefully sourcing all components from highly regarded Swiss companies” is blatant false advertising, no? Where can one buy a Swiss made parashock?

Renaldo Valentin
Renaldo Valentin
7 months ago
Reply to  Appalled

I can completely understand for I own & enjoy swiss brand watches that exclusively use eta movements. I’ve owned also sellita movements in the past but always just got standard positioning which in my experience was +12 seconds a day, so not impressed so I no longer own any. I have a Bulova precisionist quartz which is +5 seconds a day & on track for, only loosing +10/-10 seconds in a year. I have a… Read more »

Renaldo Valentin
Renaldo Valentin
7 months ago

I can completely understand for I own & enjoy swiss brand watches that exclusively use eta movements. I’ve owned also sellita movements in the past but always just got standard positioning which in my experience was +12 seconds a day, so not impressed so I no longer own any. I have a Bulova precisionist quartz which is +5 seconds a day & on track for, only loosing +10/-10 seconds in a year. I have a… Read more »

Mark Haley
Mark Haley
5 months ago

I like the idea of a black movement or PVD, but I don’t like how they aren’t being transparent about this actually being a Miyota movement. I love my Miyota by the way.

John Nelson
John Nelson
3 months ago

I’ve been trying to get more info about when Gevril began using Ruben & Son movements. This must have happened in the past 10-15 years. Previously weren’t they using quality swiss movements?

Bill Larkins
Bill Larkins
3 months ago
Reply to  John Nelson

You’re definitely right. My Gevril dress watch from back in the day had an ETA 2824 in it. Can’t believe these are being labeled Swiss Made now even though they are basically Miyota apparently and same price as what they used to charge for ETAs. If you want a Gevril today, look for older used models with the ETA imho.

Ray V.
Ray V.
3 months ago
Reply to  John Nelson

Gevril in the past used Eta movements. ALL NON SWATCH GROUP BRANDS ARE NO LONGER PERMITTED TO USE FOR YEARS NOW. So Gevril like all the other brands had to replace with movements like Sellita or design their own. The chose virtually a no name Ruben & Sons movement maker. They in turn copied the Miyota 8215 movement & call it the MDG3. For whatever reason they decided to copy a Japanese movement versus a… Read more »

Hank
Hank
3 months ago
Reply to  Ray V.

Lots wrong with this comment IMO. Firstly, it’s not that brands are not permitted to use ETA, it’s that ETA isn’t selling directly to brands outside of Swatch Group anymore. There are still plenty of brands who aregetting their hands on ETA movements. Secondly, if the MD3G is actually a blank Miyota 8215 ebauche that was modified and finished by Ruben & Sons as you say, then it’s not Swiss made. From above “By carefully… Read more »

Ray V.
Ray V.
3 months ago
Reply to  Hank

You tell me what company that’s not in the Swiss Watch group that has any movements there might be old stock models that have them but no one in the last five years has been able to use Adam movement prove it to me

MND2955
MND2955
3 months ago
Reply to  Ray V.

I think he was responding to where you said ALL NON SWATCH GROUP BRANDS ARE NO LONGER PERMITTED TO USE FOR YEARS NOW. There is a new watch on Kickstarter every week with ETA movements. They are permitted to use them.

Ray V.
Ray V.
3 months ago
Reply to  MND2955

Really give an example or link to see

12
0
Would love your thoughts, please comment.x
()
x