Seiko Cal. 4431 - 920

The 4431-920 is a sought-after Quartz piece from Seiko's golden era. It features a Green dial protected by a Hardlex crystal and offers 200m of water resistance. [seikata-wm-28c0c80e1b66]

Also known as: Bullhead, Helmet

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

11.5mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Green

Jewels

19j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1988

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