Seiko Cal. 6665 - 931

This Spring Drive model from 1978 features a 35mm Hardlex-Coated Steel case. With its 20mm lug width and 15.2mm profile, it sits comfortably on most wrists. [seikata-wm-1177eed17520]

Also known as: Navigator

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

15.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1978

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