Seiko Cal. 6637 - 823

This Spring Drive model from 1966 features a 34mm Titanium case. Powered by the 6637 caliber with 17j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-e3ce3705be77]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

34mm

Case Thickness

10.4mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Burgundy

Jewels

17j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1966

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