Seiko Cal. 3891 - 666

This Hand-Winding model from 1972 features a 45mm Hardlex-Coated Steel case. With its 19mm lug width and 15.7mm profile, it sits comfortably on most wrists. [seikata-wm-5c5332c89b0d]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

15.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

120m

Dial Color

Navy

Jewels

27j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1972

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