Seiko Cal. 4557 - 521

Seiko 4557-521

This Hand-Winding model from 1966 features a 40mm Hardlex-Coated Steel case. Powered by the 4557 caliber with 28j jewels beating at 21,600 bph, it delivers a 52 hours power reserve. [seikata-wm-f8a0c9d1b705]

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
13.5mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
50m
Dial Color
Silver
Jewels
28j
Frequency
21,600 bph
Power Reserve
52 hours
Year
1966

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