Seiko Cal. 4581 - 737

Seiko 4581-737

The 4581-737 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4581 caliber with 18j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-110afd764304]

Also known as: Sumo, Goldfeather

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
37mm
Case Thickness
11.7mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
130m
Dial Color
Silver
Jewels
18j
Frequency
36,000 bph
Power Reserve
38 hours
Year
1970

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seikata-wm-110afd764304