Seiko Cal. 6231 - 736

This Spring Drive model from 1970 features a 43mm Hardlex-Coated Steel case. With its 21mm lug width and 13.9mm profile, it sits comfortably on most wrists. [seikata-wm-818b4a59147c]

Also known as: Rally, Navigator

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

13.9mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Silver

Jewels

25j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1970

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