Seiko Cal. 5231 - 370

This Solar model from 1971 features a 37mm Gold-Plated case. Powered by the 5231 caliber with 36j jewels beating at 36,000 bph, it delivers a 40 hours power reserve. [seikata-wm-bcfbfb5d9ed8]

Also known as: Sumo, Sea Horse

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

13.4mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

White

Jewels

36j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1971

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