Seiko Cal. 6659 - 318

This Spring Drive model from 1990 features a 37mm Two-Tone case. With its 22mm lug width and 9.1mm profile, it sits comfortably on most wrists. [seikata-wm-cb2c452034f7]

Also known as: Monster, Navigator

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

9.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Black

Jewels

35j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1990

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