Seiko Cal. 4431 - 504

The 4431-504 is a sought-after Hand-Winding piece from Seiko's golden era. The Bidirectional bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-fc33afa38a69]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

46mm

Case Thickness

14.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Navy

Jewels

24j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1997

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