Seiko Cal. 4431 - 750

Released in 1979, the Cal. 4431 with design code 750 was part of Seiko's domestic market collection. With its 20mm lug width and 9.1mm profile, it sits comfortably on most wrists. [seikata-wm-617ab5fa5efe]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

9.1mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

White

Jewels

35j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1979

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