Seiko Cal. 6645 - 139

This Spring Drive model from 1988 features a 39mm Titanium case. Powered by the 6645 caliber with 31j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-737e76cc6a95]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

11.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Champagne

Jewels

31j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1988

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