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Omega 220

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Basic Information

Name	Omega 220
Manufacturer	Omega
Launch Year	1935
Caliber Family	Description 220 (23.4 until 1949): sub second 230 (23.4SC until 1949): sweep second 231 (23.4SC AM until 1949): sweep second, antimagnetic Related calibers Omega 220, Omega 23.4, Omega 23.4SC, Omega 23.4SC AM, Omega 230, Omega 231
Is COSC certified	No

Timegrapher

Beat rate

18,000 bph

Frequency

2.5 Hz

Reference: healthy amplitude ≈ 270–315° fully wound (>200° at 24 h); beat error ideally < 0.5 ms.

Technical Details

Lignes Dimensions	10.51 ‴
Dimensions	23.7 mm
Height	3.75 mm
Further Measures	Mounting Diameter (Dm): 23.4mm Stem height (T): 1.7mm Mounting Height (F): 0.5mm
Power Reserve	43 hours
Frequency	18,000 vph
Jewels	15

Complications and Specifications

Shape	Round
Complications	Sub Second Year Calendar
Regulator Type	Pinned Regulator (or Index Regulator)
Movement Type	Manual
Escapement Type	Swiss Lever
Control Type	Balance Wheel
Winding Type	Stem Winding (Crown)
Setting Type	Stem Set (Crown Pull)

Additional Information

Hand Sizes	1.4 x 0.65 / 0.15mm
Hand Count	3
Country Of Manufacture	Switzerland
Notes	Remarks: 1935- bimetallic screw balance, Breguet hairspring Other data: balance staff: U102 stem: W604 mainspring / battery: Zf1121, 1.45 x 8.5 x 0.10 x 250mm balance staff ronda: 1852 (7,75 x 12) stem ronda: 100 (8,75 x 12) Mainspring: 1.400 x 8.500 x 0.090 x 300.000 mm
Signature	1939: 8902875, Omega, Swiss, 15 Jewels (Omega 23.4)
Import Codes	OXW — J.R. Wood, Omega (1928 – 1936)

Compatible Parts

112 other caliber(s) share compatible parts with this caliber.

52 compatible part(s) available — Supporter feature.

Metadata

Created At	Sep 15, 2023
Updated At	Apr 23, 2025, 11:33:37 PM