Seiko Cal. 6631 - 383

The Seiko 6631-383 represents an important milestone in Seiko's 1980 lineup. With its 21mm lug width and 8.8mm profile, it sits comfortably on most wrists. [seikata-wm-b3fcc078a8bd]

Also known as: Rally, Emperor

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

8.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

110m

Dial Color

Silver

Jewels

24j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1980

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