Seiko Cal. 0763 - 721

This Spring Drive model from 1979 features a 42mm Stainless Steel case. Powered by the 0763 caliber with 36j jewels beating at 21,600 bph, it delivers a 47 hours power reserve. [seikata-wm-56317a6490ab]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

11.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

130m

Dial Color

Black

Jewels

36j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1979

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