Seiko Cal. 6637 - 807

This Hand-Winding model from 1976 features a 42mm Two-Tone case. It features a Cream dial protected by a Hardlex crystal and offers 170m of water resistance. [seikata-wm-55ae2c16e261]

Also known as: Monster, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

42mm

Case Thickness

14.0mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

170m

Dial Color

Cream

Jewels

35j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1976

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