Seiko Cal. 4437 - 436

This Automatic model from 1981 features a 40mm Titanium case. It features a Green dial protected by a Sapphire crystal and offers 150m of water resistance. [seikata-wm-74032e3a925d]

Also known as: Sportsmatic

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

40mm

Case Thickness

13.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

150m

Dial Color

Green

Jewels

18j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1981

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