Seiko Cal. 5639 - 910

The 5639-910 is a sought-after Hand-Winding piece from Seiko's golden era. The Bidirectional bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-ffb6cb20ec35]

Also known as: Samurai, UFO

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

43mm

Case Thickness

13.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Cream

Jewels

21j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1993

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