Seiko Cal. 6644 - 101

Seiko 6644-101

This Hand-Winding model from 1968 features a 39mm Two-Tone case. Powered by the 6644 caliber with 28j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-ceaf09625b2c]

Specifications

Movement
Hand-Winding
Case Material
Two-Tone
Case Width
39mm
Case Thickness
15.9mm
Lug Width
20mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
100m
Dial Color
Green
Jewels
28j
Frequency
28,800 bph
Power Reserve
64 hours
Year
1968

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