Seiko Cal. 5639 - 955

This Spring Drive model from 1977 features a 44mm Stainless Steel case. Powered by the 5639 caliber with 35j jewels beating at 28,800 bph, it delivers a 53 hours power reserve. [seikata-wm-45ffe74babb3]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

12.5mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1977

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