Seiko Cal. 5660 - 520

This Spring Drive model from 1978 features a 37mm Gold-Plated case. With its 20mm lug width and 11.3mm profile, it sits comfortably on most wrists. [seikata-wm-ea4a0f899328]

Also known as: UFO, Navigator

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

11.3mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

160m

Dial Color

White

Jewels

24j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1978

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