Seiko Cal. 5639 - 721

This Spring Drive model from 1995 features a 38mm Stainless Steel case. Powered by the 5639 caliber with 21j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-1ea3acb3b23c]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

9.6mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1995

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