Seiko Cal. 6642 - 538

The Seiko 6642-538 represents an important milestone in Seiko's 1973 lineup. With its 19mm lug width and 14.1mm profile, it sits comfortably on most wrists. [seikata-wm-97e845830ca8]

Also known as: Sumo, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

14.1mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Cream

Jewels

27j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1973

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