Omega 351

Last updated: August 4, 2025

Brand

Omega

Caliber Number

351

Production Period

1949 – 1954

Lignes

12.5”’

Diameter

28.1 mm

Height

5.4 mm

Power Reserve

Unconfirmed

Frequency

19,800 bph (2.75 Hz)

Jewels

Escapement

Swiss Lever Escapement

Anti-Shock Device

Incabloc

Hand Count

3 (Hours, Minutes, Sweep Seconds)

Manufacture Region

Unconfirmed

Functions

Automatic “Bumper” Winding, Sweep Seconds

Omega 351 Description

The Omega 351 is the foundational workhorse of the brand’s “bumper” automatic movement family. Produced in large numbers from 1949-1954, it was the base time-only (sweep seconds), non-chronometer version used extensively in early Omega Seamaster models. Its robust bumper winding mechanism and reliable performance were instrumental in popularizing automatic watches for the brand. It operates at 19,800 bph.