Seiko Cal. 6637 - 990

Seiko 6637-990

This Hand-Winding model from 1987 features a 36mm Stainless Steel case. Powered by the 6637 caliber with 23j jewels beating at 21,600 bph, it delivers a 62 hours power reserve. [seikata-wm-14254028e01c]

Specifications

Movement
Hand-Winding
Case Material
Stainless Steel
Case Width
36mm
Case Thickness
12.6mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
80m
Dial Color
Burgundy
Jewels
23j
Frequency
21,600 bph
Power Reserve
62 hours
Year
1987

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seikata-wm-14254028e01c