Seiko Cal. 6637 - 957

Seiko 6637-957

This Hand-Winding model from 1995 features a 43mm Titanium case. Powered by the 6637 caliber with 33j jewels beating at 28,800 bph, it delivers a 63 hours power reserve. [seikata-wm-76f02bf806ce]

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
43mm
Case Thickness
12.2mm
Lug Width
20mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
180m
Dial Color
Blue Sunburst
Jewels
33j
Frequency
28,800 bph
Power Reserve
63 hours
Year
1995

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