Seiko Cal. 5635 - 510

This Spring Drive model from 1983 features a 40mm Titanium case. Powered by the 5635 caliber with 20j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-3c554ed1f260]

Also known as: Navigator, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

8.8mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Green

Jewels

20j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1983

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