Seiko Cal. 4421 - 583

This Hand-Winding model from 1990 features a 46mm Hardlex-Coated Steel case. It features a Silver dial protected by a Acrylic crystal and offers 100m of water resistance. [seikata-wm-4d4c0d38c21e]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

12.9mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Silver

Jewels

22j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1990

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