Seiko Cal. 6633 - 171

This Spring Drive model from 1979 features a 39mm Hardlex-Coated Steel case. With its 22mm lug width and 12.8mm profile, it sits comfortably on most wrists. [seikata-wm-868d8dde4d17]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

12.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Black

Jewels

21j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1979

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