Seiko Cal. 4420 - 950

This Spring Drive model from 1973 features a 40mm Titanium case. It features a Champagne dial protected by a Sapphire crystal and offers 190m of water resistance. [seikata-wm-0fb46934c8f7]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

14.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Champagne

Jewels

32j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1973

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