Seiko Cal. 4470 - 531

This Hand-Winding model from 1972 features a 37mm Titanium case. It features a Green dial protected by a Hardlex crystal and offers 110m of water resistance. [seikata-wm-a3e6f07550c5]

Also known as: Tuna, Helmet

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

37mm

Case Thickness

8.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Green

Jewels

32j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1972

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