Seiko Cal. 6637 - 977

This Spring Drive model from 1973 features a 43mm Titanium case. It features a Black dial protected by a Mineral crystal and offers 200m of water resistance. [seikata-wm-79d36a87fae3]

Also known as: Shogun, UFO

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

12.7mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Black

Jewels

34j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1973

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