Seiko Cal. 6637 - 495

This Spring Drive model from 1981 features a 46mm PVD Black case. With its 22mm lug width and 11.5mm profile, it sits comfortably on most wrists. [seikata-wm-088c175cc7d3]

Also known as: Samurai, Bullhead

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

11.5mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1981

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