Ela Valjoux Caliber 7751

ETA/Valjoux Caliber 7751

Ela Valjoux Caliber 7751

Brand ETA / Valjoux
Caliber Number 7751
Base Caliber
ETA 7750
Movement Type Automatic
Diameter 13 1/4”’ (30.00mm)
Thickness 7.90mm
Jewels 25
Power Reserve ~48 hours
Vibrations Per Hour 28,800 BPH
Lift Angle
49 degrees
Shock System Incabloc
Functions Central hours, central minutes, central chronograph seconds, central date hand, small running seconds at 9:00, day of the week at 12:00 (left side), month at 12:00 (right side), 30 minutes chronograph counter at 12:00, 12 hours chronograph counter at 6:00, moonphase indicator at 6:00, 24 hour time at 9:00
Country of Manufacture Switzerland
Known Models Zahnd & Kormann Triple Date Moonphase Chrono, Dubey & Schaldenbrand Gran Chrono Astro (Too many to list, please add your watch in the comments below…)

The ETA/Valjoux caliber 7751 is a 25 jewels Swiss made self-winding automatic movement. This extremely multi-functional caliber is based on the legendary ETA/Valjoux caliber 7750 chronograph, but with additional complications including a full moon phase indicator at 6:00, a central date hand pointing to the date in the outer perimeter of the dial, day of the week and month windows at 12:00, and a 24 hour hand at 9:00.

 

ETA 7751

 

Setting the time

When setting the date on your caliber 7751 watch, do not attempt to do so while the hands on the watch are displaying between 8:00PM and 2:00AM. Before adjusting anything, be sure to move the hands to a time outside of this zone – this is to make sure the date flipping sequence at midnight has occurred. For the moonphase, do not make adjustments between 8:00PM and 6:00AM. Doing so can cause serious damage to the calendar gears in the movement.

  • Winding – Neutral (position) 1 is hand-winding position. If your watch is equipped with a screw down crown, unscrew it and you will be in position 1.
  • Time – Pull the crown out 2 clicks (position 3). Turn the crown clockwise or counterclockwise to set the time.
  • Day of the week – Use the pusher on the side of the watch near the 10:00 position
  • Date – Pull the crown out one click (position 2) and turn it counterclockwise
  • Month – While in date setting mode (position 2 and turning counterclockwise) continue to change the date until it passes the 31st of the month. This will advance the month indicator to the next month. Keep doing this until your current month is selected, stopping on the day.
  • Moonphase – Pull the crown out one click and turn clockwise until your desired moonphase setting is reached.

Chronograph Sequence

The chrono sequence on the VD51B is the same as most chronograph watches:

  • Start – top button
  • Stop – top button
  • Reset – bottom button

Note: If your chronograph isn’t running, it’s most likely due to your watch not having enough power reserve. Simply wind the watch fully before engaging the chronograph function. Also be aware that running the chronograph makes use of additional gears in the movement and will cause your overall power reserve to run out faster. This should not be an issue as long as you are wearing the watch.

Dial Side View of the Complications

Triple calendar (Day/month windows at 12:00, date hand), 30 minute chronograph totalizer:

Zahnd Kormann Chronograph Microbrand Watch 18

24 hour subdial at 9:00, small running seconds:

Zahnd Kormann Chronograph Microbrand Watch 16

Moonphase indicator at 6:00, 12 hour chronograph totalizer:

Zahnd Kormann Chronograph Microbrand Watch 17

Watches with this caliber

The pictured example of the ETA caliber 7751 was found in a Dubey & Schaldenbrand Gran Chrono Astro.

This movement has been custom decorated by the manufacturer. The movement has a hand-engraved decorated gold finish. The rotor is skeletonized and blued steel screws can be spotted throughout. Dubey & Schaldenbrand proudly states that their use of this caliber has a chronometer-quality escapement.

Here is an example of a Top Grade 7751 found in a Z&K watch:

Zahnd Kormann Chronograph Microbrand Watch 20

Video:

More watches with caliber 7751

Additional Resources:

Please share your experiences and thoughts about the ETA/Valjoux caliber 7751 in the comments section below…


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Sally
Sally
5 years ago

Beautiful

Thomas
Thomas
5 years ago

Beautiful, & dependable movement. It makes an incredible watch at an affordable price point! I own 3.

Robert
Robert
5 years ago

I have one of these I’ve been wearing for a couple of weeks and the accuracy is very impressive. Someone really did a great job of adjusting it. It is able to keep within one second of NIST time for days on end. This is only with wrist movement. No winding.

trackback
Graham Caliber G1749 Watch Movement | CaliberCorner.com
4 years ago

[…] 7751 (12/6/9 subdials with central date hand, day/month at 12, moonphase at 6) […]

Antonio Arias
Antonio Arias
3 years ago

This caliber is also bases for Omega 3606 and 1152, used in some models of the Speedmaster Day-Date, with refs 3220.50 and 3520.50

Carlos D. Montemayor
Carlos D. Montemayor
3 years ago

I have the Tourneau 2010 in black Moonphase edition. Let me tell you, even nearly a decade later, I feel honored to have this watch. The style of the watch is breathtaking and the movement is gorgeous, a gorgeous and magnificent technological masterpiece of watch engineering. I take very good care of it, and it looks new. I have two other expensive watches, one being a Cartier, and it’s not worth the same in style… Read more »

Joel
Joel
1 year ago

Dear Carlos
Can I have your contact email?
I have also have the Tourneau 2010 in black Moonphase edition
And would love to share some photos

Regards
Joel

Joel
Joel
1 year ago
Reply to  Caliber Corner

Thanks , will aprecciate help regarding my watch

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Joel
Joel
1 year ago
Reply to  Joel

new pic

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Joel
Joel
1 year ago
Reply to  Joel

closer

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Joel
Joel
1 year ago

is the same watch Carlos?

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Don
Don
2 years ago

As well implemented in Longines Master Collection Automatic Chronograph Men’s Watch L27734783

Richard Teevan
Richard Teevan
2 years ago

Hello: I have an older (1990-2000’s) Dubois et Fils – triple Cal-moonphase Gold case watch with the 7751. Only issue is the date pusher at 10:00 Broke for the 2nd time arggh . I Will get repaired again, as i love the racing themed lumed numbers on the white dial.

Thomas Westphal
Thomas Westphal
2 years ago

I own 3 different watches that contain the 7751, 1: Omega, 2: Invicta 3: SWI. I love all 3 of them, especially the SWI, I like the case, and band. The 7751 has proven itself to be very durable, and accurate, plus it’s very impressive with its multiple complications.

Szosky
Szosky
2 years ago

When setting the time on your caliber 7751 watch, do not attempt…”. Makes no sense. It’s the date adjustment that needs to be avoided.

Eric Coates
Eric Coates
1 year ago

I have a Universal Geneve Tri Compax And a newly purchased stunning Dubeys & Schaldenbrand Artisans with a 7751 movement even more exquisite than the one shown here. I couldn’t be more thrilled with the movement – especially the latter.

Gregory Johnsons
Gregory Johnsons
1 year ago
Reply to  Eric Coates

Can you post a picture? I have never seen a movement so exquisite as the one in the video above and now you got me all excited!

Joel
Joel
1 year ago

What a wondderfull Blog
Could anyone give more information regarding my watch?
I posted a comment in tourneau page but no answer received

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Gregory Johnsons
Gregory Johnsons
1 year ago
Reply to  Joel

That is a beautiful watch! It looks like the same as the gold 7751 movement in the pics above except the rotor has Tourneau instead of DS. What is the information you want to know about your watch? Where did you get it from?

Joel
Joel
1 year ago

Thank you so much for your answer. I buyed from a Collector in México
I want to know estaimated sales price!!!

Appreciate your help.

Joel

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trackback
Reseña Ernst Benz ChronoLunar - SaFonaGastroCrono
1 year ago

[…] tres modelos del ChronoLunar equipan el calibre suizo ETA (Valjoux) 7751. Es un calibre automático que oscila a 28.800 vph (4 Hz), cuenta con 25 rubíes y ofrece 44 horas […]

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Tool and Supply List to Fully Service an ETA 7750 or ETA 7751 Movement - Mr. HVAC
1 year ago

[…] Here is a complete list of tools and supplies needed to disassemble, clean, and reassemble a Valjoux ETA 7750 or ETA 7751 watch movement. […]

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KUDOKE Caliber 1 Watch Movement | Caliber Corner
1 year ago

[…] For example, look at the ETA/Valjoux 7750 with its basic chronograph function. Then look at the 7751 which adds a triple date and moonphase. Imagine if the 7751 was referred to as 7750-TDM or […]

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Dubey & Schaldenbrand Grand Dome DT Vintage 1946 | WWR
10 months ago

[…] the previous iteration, the timekeeper is powered by a modified version of the well-known ETA Valjoux 7751 movement (it is basically the same cal. 7750 work-horse with a full calendar […]

Vincent harris
Vincent harris
6 months ago

Very good movement been using for 10 years and is very reliable every time

Martin
Martin
5 months ago

I read your comments about 7751 and I was so amazed by many positive feedback that I decided to build my own watch with this movement. Reason to build one was because my budget didn’t exactly reached the minimum limit to buy one of this watches from any brand. Besides, the cheapest ones I find was over my budget anyway and I didn’t really liked the style of colors that have been available. So after… Read more »

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eugene
eugene
4 months ago
Reply to  Martin

Well done, thats gorgeous

Josh
Josh
2 months ago
Reply to  Martin

Wow love this and I was like what brand! Haha. If you make another let me know 🙂

eugene
eugene
4 months ago

I have this movement in my fun watch, an Alain Silberstein Krono and i love it. Only criticism is the depth, its one thick movement, especially compared to the El Primero 410z movement in my triple date / chrono/ moonphase zenith

Dan T
Dan T
1 month ago

i have half dozen that i have made and have trouble even thinking about selling any, thanks for looking

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Pointer Date Watch Movements | Caliber Corner
21 days ago

[…] In the next example, the Eterna Matic 1948 Moon Phase Chrono has such a hand. It is powered by an ETA/Valjoux 7751 is your […]

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ETACHRON Regulator Watch Movement | Caliber Corner
15 days ago

[…] Movement pictured below is an ETA/Valjoux caliber 7751 […]

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Venus Caliber 178

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