Seiko Cal. 4431 - 707

The Seiko 4431-707 represents an important milestone in Seiko's 1965 lineup. With its 19mm lug width and 12.1mm profile, it sits comfortably on most wrists. [seikata-wm-7ad2acaa6ef0]

Also known as: Arnie

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

12.1mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

100m

Dial Color

Black

Jewels

17j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1965

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