Seiko Cal. 6377 - 821

This Hand-Winding model from 1991 features a 41mm Hardlex-Coated Steel case. With its 22mm lug width and 9.8mm profile, it sits comfortably on most wrists. [seikata-wm-ab36a935dfe1]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

9.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Black

Jewels

17j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1991

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