Seiko Cal. 4431 - 679

The 4431-679 is a sought-after Spring Drive piece from Seiko's golden era. With its 22mm lug width and 12.6mm profile, it sits comfortably on most wrists. [seikata-wm-57019df94ca6]

Also known as: Sportsmatic, Navigator

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

12.6mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1966

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