Omega 283

Last updated: August 4, 2025
Close-up of an Omega Swiss watch movement showing gears and intricate mechanical components.

Brand

Caliber Number

283

Production Period

1949 – 1960

Lignes

13.3”’

Diameter

30.0 mm

Height

5.1 mm

Power Reserve

Unconfirmed

Frequency

18,000 bph (2.5 Hz)

Jewels

17

Escapement

Swiss Lever Escapement

Anti-Shock Device

Incabloc

Hand Count

3 (Hours, Minutes, Sweep Seconds)

Manufacture Region

Unconfirmed

Functions

Manual Winding, Sweep Seconds

Omega 283 Description

The Omega 283 is an early and significant evolution of the legendary 30T2 SC manual-wind caliber. Renamed in 1949, this 30mm movement with sweep-seconds powered countless Omega watches, including military-issue models, for over a decade. It is celebrated for its robust design, reliability, and accuracy, making it a cornerstone of Omega’s mid-century reputation.

Watches Using The Omega 283 Caliber

A vintage Omega Railmaster 2914 wristwatch with a black dial, white numerals, beige minute markers, and a tan leather strap. The round stainless steel case and silver hands complete this classic timepiece.
Railmaster

Omega Railmaster 2914

1957-1963
38mm
A vintage Omega wristwatch with a brown, slightly speckled dial, gold hour markers and hands, and a tan leather strap, displayed against a plain white background.
Omega

Omega 2640

1949-1958
36mm