Seiko Cal. 6644 - 131

Seiko 6644-131

This Spring Drive model from 1971 features a 34mm PVD Black case. With its 20mm lug width and 9.3mm profile, it sits comfortably on most wrists. [seikata-wm-79a2c826aeeb]

Also known as: Bullhead, Sea Horse

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
34mm
Case Thickness
9.3mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
170m
Dial Color
Cream
Jewels
28j
Frequency
21,600 bph
Power Reserve
69 hours
Year
1971

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