Seiko Cal. 6637 - 420

This Hand-Winding model from 1982 features a 43mm Titanium case. Powered by the 6637 caliber with 29j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-fb7898d7d065]

Also known as: Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

43mm

Case Thickness

13.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Cream

Jewels

29j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1982

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