Seiko Cal. 4518 - 489

This Spring Drive model from 1981 features a 40mm Titanium case. It features a Green dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-8974a3b96851]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

14.7mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Green

Jewels

36j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1981

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