Seiko Cal. 4431 - 566

The 4431-566 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4431 caliber with 31j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-d155df364bb8]

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

12.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

80m

Dial Color

Navy

Jewels

31j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1972

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