Seiko Cal. 4581 - 636

Seiko 4581-636

The 4581-636 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4581 caliber with 28j jewels beating at 28,800 bph, it delivers a 53 hours power reserve. [seikata-wm-e1560a53f6e7]

Also known as: Shogun, Pogue

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
36mm
Case Thickness
12.6mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
170m
Dial Color
Blue Sunburst
Jewels
28j
Frequency
28,800 bph
Power Reserve
53 hours
Year
1970

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