Seiko Cal. 5231 - 666

This Spring Drive model from 1971 features a 36mm Gold-Plated case. With its 18mm lug width and 9.9mm profile, it sits comfortably on most wrists. [seikata-wm-d2207f125339]

Also known as: Navigator, Arnie

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

9.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

140m

Dial Color

Navy

Jewels

35j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1971

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