Seiko Cal. 4431 - 585

The 4431-585 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4431 caliber with 30j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-5090a80ccc27]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

37mm

Case Thickness

14.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Green

Jewels

30j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1966

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