Seiko Cal. 6644 - 163

Seiko 6644-163

This Hand-Winding model from 1974 features a 39mm Hardlex-Coated Steel case. Powered by the 6644 caliber with 30j jewels beating at 36,000 bph, it delivers a 36 hours power reserve. [seikata-wm-73f5c441f1d1]

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
39mm
Case Thickness
13.3mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
40m
Dial Color
Silver
Jewels
30j
Frequency
36,000 bph
Power Reserve
36 hours
Year
1974

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