Seiko Cal. 4420 - 900

This Spring Drive model from 1996 features a 37mm Hardlex-Coated Steel case. It features a Champagne dial protected by a Acrylic crystal and offers 150m of water resistance. [seikata-wm-37934e90944c]

Also known as: Sumo, Bullhead

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

11.5mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

150m

Dial Color

Champagne

Jewels

31j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1996

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