Seiko Cal. 5634 - 311

The Seiko 5634-311 represents an important milestone in Seiko's 1970 lineup. With its 22mm lug width and 11.6mm profile, it sits comfortably on most wrists. [seikata-wm-fc6cbde24175]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

11.6mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1970

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