Seiko Cal. 6637 - 404

This Hand-Winding model from 1983 features a 40mm Titanium case. Powered by the 6637 caliber with 34j jewels beating at 21,600 bph, it delivers a 58 hours power reserve. [seikata-wm-9b849571477e]

Also known as: Bellmatic, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

10.7mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Burgundy

Jewels

34j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1983

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