Seiko Cal. 3817 - 743

This Hand-Winding model from 1979 features a 42mm Stainless Steel case. Powered by the 3817 caliber with 32j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-887a2119f046]

Also known as: Sumo, Crown

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

10.9mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Silver

Jewels

32j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1979

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