Seiko Cal. 5681 - 693

This Hand-Winding model from 1967 features a 42mm Two-Tone case. Powered by the 5681 caliber with 21j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-6e68defedac1]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

42mm

Case Thickness

13.8mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Champagne

Jewels

21j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1967

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