Omega 342

Last updated: August 4, 2025
Close-up of a vintage Omega watch movement with visible gears, cogs, and engraved serial numbers.

Brand

Caliber Number

342

Production Period

1949 – 1953

Lignes

12.5”’

Diameter

28.1 mm

Height

5.4 mm

Power Reserve

Unconfirmed

Frequency

19,800 bph (2.75 Hz)

Jewels

17

Escapement

Swiss Lever Escapement

Anti-Shock Device

Incabloc

Hand Count

3 (Hours, Minutes, Sub-Seconds)

Manufacture Region

Unconfirmed

Functions

Automatic “Bumper” Winding, Small Seconds

Omega 342 Description

The Omega 342 is the workhorse “bumper” automatic caliber featuring a classic small sub-seconds display. Produced from 1949-1953, it was the standard non-chronometer version, counterpart to the chronometer-grade Cal. 344. This robust movement powered a vast number of Omega automatics, including many early Seamasters, offering the convenience of self-winding with a traditional dial layout.

Watches Using The Omega 342 Caliber

A vintage Omega Seamaster 2576 automatic wristwatch with a beige dial, silver hour markers, small seconds subdial at 6 o’clock, silver case, and a tan leather strap with white stitching.
Seamaster

Omega Seamaster 2576

1949-1955
34mm