Seiko Cal. 5231 - 890

This Spring Drive model from 1965 features a 37mm Stainless Steel case. Powered by the 5231 caliber with 22j jewels beating at 21,600 bph, it delivers a 54 hours power reserve. [seikata-wm-39fd680f5bb2]

Also known as: Turtle, Navigator

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

15.5mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

90m

Dial Color

Black

Jewels

22j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1965

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