Seiko Cal. 4520 - 818

The Seiko 4520-818 represents an important milestone in Seiko's 1981 lineup. The Fixed bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-2c7714c473ef]

Also known as: Helmet

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

42mm

Case Thickness

8.0mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

110m

Dial Color

Green

Jewels

21j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1981

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