Seiko Cal. 5637 - 246

This Hand-Winding model from 1978 features a 37mm Hardlex-Coated Steel case. Powered by the 5637 caliber with 22j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-5e94c632674a]

Also known as: Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

10.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

150m

Dial Color

Silver

Jewels

22j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1978

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