Seiko Cal. 4431 - 123

This Hand-Winding model from 1965 features a 43mm PVD Black case. With its 21mm lug width and 13.8mm profile, it sits comfortably on most wrists. [seikata-wm-d5279cfd1bdc]

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

43mm

Case Thickness

13.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

150m

Dial Color

Navy

Jewels

28j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1965

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