Seiko Cal. 3810 - 964

This Hand-Winding model from 1991 features a 41mm PVD Black case. With its 21mm lug width and 15.8mm profile, it sits comfortably on most wrists. [seikata-wm-ae339cc73699]

Also known as: Sumo, World Timer

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

41mm

Case Thickness

15.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

40m

Dial Color

Black

Jewels

30j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1991

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