Seiko Cal. 5231 - 918

This Automatic model from 1965 features a 40mm PVD Black case. With its 21mm lug width and 10.7mm profile, it sits comfortably on most wrists. [seikata-wm-5a4bdbd8ffe1]

Also known as: Flighty

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

40mm

Case Thickness

10.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Green

Jewels

18j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1965

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