Seiko Cal. 0771 - 316

This Spring Drive model from 1965 features a 40mm Gold-Plated case. Powered by the 0771 caliber with 20j jewels beating at 21,600 bph, it delivers a 62 hours power reserve. [seikata-wm-6216b5bd93d2]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

8.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

30m

Dial Color

Champagne

Jewels

20j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1965

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