Omega trench watch with ENTRAL case - looking for verification

Maneesh · Feb 1, 2026

Hello all,
I’m seeking help verifying an early Omega wristwatch.

•Dial signed Omega, enamel Roman numerals, red XII, sub-seconds
•Early trench-style case with wire lugs and onion crown
•Inside caseback marked: ENTRAL / Fab. Suisse / Plaque Or / Garanti 10 Ans
•Case number: 675392

I understand Omega used third-party Swiss case makers in this era, especially for plated cases. I’d appreciate confirmation on whether ENTRAL-marked cases are known on genuine Omega watches and whether this case/movement pairing looks period-correct.

Photos of the dial, movement, and caseback are attached.

Thank you for your insights.

JimInOz · Feb 1, 2026

Omega had cases made by many companies until recently.
The case was made for Omega by Central Watch Case Company (La Centrale) of Gehäuse; Biel, Switzerland.

Maneesh · Feb 1, 2026

Thanks for the reply.
So, is it legit or a franken

gatorcpa · Feb 1, 2026

Looks legit to me. Central Watch Case Co. was a known contractor for Omega almost since their founding.

Based on charts for both the movement and case serial numbers, your watch dates from the early 1920’s.

https://omegaforums.net/threads/whats-with-the-date-error-in-the-in-the-omegamani-serial-number-chart.68711/

Thread 'Whats with the date error in the in the Omegamani serial number chart?' ·

http://www.omega-fanatic.com/media/.gallery/image253.jpg
I just noticed the Omegamania Serial number chart has date errors at 6M, 7M, 8M and 9M. It goes 1923 then 1920, 1934 then back to...

DG GW · Dec 26, 2017

Hope this helps,
gatorcpa

Maneesh · Feb 1, 2026

gatorcpa
Looks legit to me. Central Watch Case Co. was a known contractor for Omega almost since their founding.

Based on charts for both the movement and case serial numbers, your watch dates from the early 1920’s.

https://omegaforums.net/threads/whats-with-the-date-error-in-the-in-the-omegamani-serial-number-chart.68711/

Thread 'Whats with the date error in the in the Omegamani serial number chart?' ·
http://www.omega-fanatic.com/media/.gallery/image253.jpg
I just noticed the Omegamania Serial number chart has date errors at 6M, 7M, 8M and 9M. It goes 1923 then 1920, 1934 then back to...

DG GW · Dec 26, 2017

Hope this helps,
gatorcpa

Thanks for the advice, it means a lot

Omega trench watch with ENTRAL case - looking for verification

Maneesh

JimInOz

Maneesh

gatorcpa

Maneesh

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