Seiko Cal. 4513 - 644

Seiko 4513-644

The 4513-644 is a sought-after Quartz piece from Seiko's golden era. Powered by the 4513 caliber with 36j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-8cb8ccd1b379]

Also known as: Helmet

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
36mm
Case Thickness
15.7mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
40m
Dial Color
Blue Sunburst
Jewels
36j
Frequency
21,600 bph
Power Reserve
60 hours
Year
1976

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seikata-wm-8cb8ccd1b379