Seiko Cal. 4521 - 580

Seiko 4521-580

This Hand-Winding model from 1979 features a 37mm Hardlex-Coated Steel case. Powered by the 4521 caliber with 23j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-b68dcf4b635b]

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
37mm
Case Thickness
12.3mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
140m
Dial Color
Blue Sunburst
Jewels
23j
Frequency
28,800 bph
Power Reserve
42 hours
Year
1979

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