Seiko Cal. 5231 - 364

This Automatic model from 1972 features a 39mm Two-Tone case. Powered by the 5231 caliber with 33j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-453b6f4c1ca4]

Also known as: Rally

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

12.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1972

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