Seiko Cal. 5677 - 810

This Hand-Winding model from 1976 features a 42mm Stainless Steel case. Powered by the 5677 caliber with 26j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-16a1bb76652e]

Also known as: Sumo, Helmet

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

13.1mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

White

Jewels

26j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1976

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