Seiko Cal. 6637 - 968

Seiko 6637-968

This Hand-Winding model from 1989 features a 40mm Hardlex-Coated Steel case. With its 19mm lug width and 13.6mm profile, it sits comfortably on most wrists. [seikata-wm-2c06f3e4e7e9]

Also known as: Bullhead

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
13.6mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
160m
Dial Color
White
Jewels
24j
Frequency
21,600 bph
Power Reserve
72 hours
Year
1989

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