Seiko Cal. 3831 - 537

This Solar model from 1965 features a 40mm Stainless Steel case. The Bidirectional bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-e1475ea70fe3]

Also known as: UFO, Arnie

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

10.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1965

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