Seiko Cal. 6655 - 645

This Spring Drive model from 1990 features a 40mm Titanium case. With its 18mm lug width and 11.9mm profile, it sits comfortably on most wrists. [seikata-wm-d66c43c0e3f3]

Also known as: Turtle, Sumo

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

11.9mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

30m

Dial Color

Green

Jewels

18j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1990

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