Seiko Cal. 4431 - 444

This Spring Drive model from 1978 features a 34mm Hardlex-Coated Steel case. With its 18mm lug width and 8.7mm profile, it sits comfortably on most wrists. [seikata-wm-81065708f91e]

Also known as: Goldfeather, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

8.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Green

Jewels

19j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1978

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