Seiko Cal. 6635 - 879

This Spring Drive model from 1989 features a 42mm Two-Tone case. Powered by the 6635 caliber with 31j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-08b95b4d1310]

Also known as: Turtle, Bullhead

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

14.6mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1989

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