Seiko Cal. 4431 - 780

The 4431-780 is a sought-after Spring Drive piece from Seiko's golden era. The Fixed bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-b61b0345ce05]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

12.9mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1985

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