Seiko Cal. 4431 - 522

Released in 1990, the Cal. 4431 with design code 522 was part of Seiko's domestic market collection. It features a Cream dial protected by a Hardlex crystal and offers 130m of water resistance. [seikata-wm-d1ac8537fc15]

Also known as: Monster, Helmet

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

8.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Cream

Jewels

22j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1990

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