Seiko Cal. 6635 - 863

The Seiko 6635-863 represents an important milestone in Seiko's 1983 lineup. Powered by the 6635 caliber with 35j jewels beating at 28,800 bph, it delivers a 65 hours power reserve. [seikata-wm-c9827b12a2b0]

Also known as: Sumo

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

15.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

100m

Dial Color

Silver

Jewels

35j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1983

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