Seiko Cal. 4477 - 631

Seiko 4477-631

This Hand-Winding model from 1972 features a 41mm Hardlex-Coated Steel case. Powered by the 4477 caliber with 18j jewels beating at 28,800 bph, it delivers a 53 hours power reserve. [seikata-wm-b7751fea3040]

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
41mm
Case Thickness
11.0mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
70m
Dial Color
Black
Jewels
18j
Frequency
28,800 bph
Power Reserve
53 hours
Year
1972

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seikata-wm-b7751fea3040