Seiko Cal. 5639 - 617

This Hand-Winding model from 1979 features a 42mm Titanium case. Powered by the 5639 caliber with 29j jewels beating at 36,000 bph, it delivers a 69 hours power reserve. [seikata-wm-77ab95856ede]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

42mm

Case Thickness

8.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Navy

Jewels

29j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1979

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