Seiko Cal. 3860 - 457

This Hand-Winding model from 1977 features a 39mm Titanium case. The Fixed bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-920f8d41247a]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

39mm

Case Thickness

13.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

100m

Dial Color

Black

Jewels

28j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1977

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