Seiko Cal. 6637 - 808

This Spring Drive model from 1988 features a 39mm PVD Black case. With its 22mm lug width and 9.0mm profile, it sits comfortably on most wrists. [seikata-wm-819f6bd45deb]

Also known as: Sumo, Emperor

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

9.0mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Cream

Jewels

24j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1988

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