Seiko Cal. 4431 - 960

This Spring Drive model from 1974 features a 46mm PVD Black case. With its 22mm lug width and 9.9mm profile, it sits comfortably on most wrists. [seikata-wm-327be087ddd6]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

9.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

130m

Dial Color

Green

Jewels

18j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1974

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