Beta 21

Last updated: August 4, 2025
Close-up of a watch movement with visible gears, battery, screws, and electronic components.

Brand

Unconfirmed

Caliber Number

Beta 21

Production Period

1969 – 1976

Lignes

N/A (Form Movement)

Diameter

29.0mm x 24.5mm

Height

7.1 mm

Power Reserve

Unconfirmed

Frequency

8,192 Hz

Jewels

13

Escapement

Electro-mechanical Vibrating Motor

Anti-Shock Device

Inherently High

Hand Count

3 (Hours, Minutes, Sweep Seconds)

Manufacture Region

Unconfirmed

Functions

Hours, Minutes, Sweep Seconds, often Date or Day-Date

Beta 21 Description

The Beta 21 was the first Swiss production analog quartz movement, a landmark collaborative effort by the CEH consortium (Rolex, Patek, Omega, etc.) released in 1969. It is noted for its unique 8,192 Hz quartz bar, which produced a humming sound and a sweeping (not ticking) seconds hand. This large, modular movement powered a variety of iconic and futuristic watches and was the Swiss industry’s answer to the dawn of quartz.

Watches Using The Beta 21 Caliber

A gold Omega Constellation Electroquartz 196.005 wristwatch with a square case, gold dial, single red seconds hand, and date display at 6 o’clock. The face shows “ELECTROQUARTZ f 8192 Hz” above the date window.
Constellation

Omega Constellation Electroquartz 196.005

1970-1976
37mm