Seiko Cal. 5636 - 903

The 5636-903 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5636 caliber with 31j jewels beating at 28,800 bph, it delivers a 69 hours power reserve. [seikata-wm-e7addb0f7776]

Also known as: World Timer

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

10.8mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

180m

Dial Color

White

Jewels

31j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1980

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