Seiko Cal. 6635 - 913

The Seiko 6635-913 represents an important milestone in Seiko's 1988 lineup. Powered by the 6635 caliber with 35j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-aa0e0737d8fa]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

45mm

Case Thickness

8.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Champagne

Jewels

35j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1988

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