Seiko Cal. 6637 - 658

Seiko 6637-658

This Quartz model from 1966 features a 36mm Stainless Steel case. Powered by the 6637 caliber with 21j jewels beating at 28,800 bph, it delivers a 53 hours power reserve. [seikata-wm-8698bede1572]

Specifications

Movement
Quartz
Case Material
Stainless Steel
Case Width
36mm
Case Thickness
14.5mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
70m
Dial Color
Navy
Jewels
21j
Frequency
28,800 bph
Power Reserve
53 hours
Year
1966

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seikata-wm-8698bede1572