What are the case specifications of the OMEGA?

The OMEGA features a Steel case.

What is the water resistance of the OMEGA?

The OMEGA has a water resistance rating of 30m (rain/splash).

What movement does the OMEGA use?

The OMEGA is powered by a Manual Winding, caliber 283.

When was the OMEGA produced?

The OMEGA CK 2640 has been in production from 1949 to 1958.

OMEGA CK 2640

Manual WindingSteel

Ref. CK 2640

Movement: 283Production: 1949 - 1958

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Last updated 5 Oct 2026Suggest a correction

TECHNICAL SPECIFICATIONS

CASE

Case Material

Steel

Water Resistance

30m

MOVEMENT

Movement Type

Manual Winding

Caliber

283

BRACELET/STRAP

Bracelet/Strap

Leather

Other watches with the 283 calibre

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OMEGA

CK 2320

Manual WindingSteel

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CK 2496

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OMEGA

CK 2506

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OMEGA

CK 2608

Manual WindingSteel

OMEGA

CK 2760

Manual WindingSteel

OMEGA

CK 2777

Manual WindingSteel

OMEGA

CK 2810

Manual Winding

OMEGA

DW 2498

Manual Winding

QUICK FACTS

BRAND

OMEGA

REFERENCE

CK 2640

MOVEMENT

Manual Winding

CALIBER

283

CASE MATERIAL

Steel

WATER RESISTANCE

30m (rain/splash)

PRODUCTION

1949 - 1958

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Last updated 5 Oct 2026Suggest a correction

FOR WATCH DEALERS

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OMEGA CK 2640

TECHNICAL SPECIFICATIONS

CASE

MOVEMENT

BRACELET/STRAP

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Other watches with the 283 calibre

CK 2320

CK 2496

CK 2506

CK 2608

CK 2760

CK 2777

CK 2810

DW 2498

QUICK FACTS

FOR WATCH DEALERS