Seiko Cal. 5640 - 172

This Spring Drive model from 1975 features a 45mm Stainless Steel case. Powered by the 5640 caliber with 26j jewels beating at 36,000 bph, it delivers a 60 hours power reserve. [seikata-wm-cb91449398a5]

Also known as: UFO, Emperor

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

14.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

100m

Dial Color

Cream

Jewels

26j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1975

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