Seiko Cal. 6631 - 556

This Spring Drive model from 1989 features a 38mm Two-Tone case. Powered by the 6631 caliber with 17j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-f270c2e47816]

Also known as: Turtle, Silverwave

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

38mm

Case Thickness

9.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Silver

Jewels

17j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1989

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