Seiko Cal. 6637 - 752

This Spring Drive model from 1980 features a 45mm Two-Tone case. With its 22mm lug width and 15.7mm profile, it sits comfortably on most wrists. [seikata-wm-473870919cf8]

Also known as: Monster, Silverwave

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

15.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

30m

Dial Color

Cream

Jewels

36j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1980

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