Seiko Cal. 5637 - 559

Seiko 5637-559

The 5637-559 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5637 caliber with 36j jewels beating at 28,800 bph, it delivers a 65 hours power reserve. [seikata-wm-cf5a75953dfc]

Also known as: Helmet

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
46mm
Case Thickness
9.4mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
30m
Dial Color
Silver
Jewels
36j
Frequency
28,800 bph
Power Reserve
65 hours
Year
1976

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