Seiko Cal. 4520 - 922

This Quartz model from 1977 features a 40mm Stainless Steel case. It features a Navy dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-930e1c2656be]

Also known as: World Timer

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

12.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

100m

Dial Color

Navy

Jewels

29j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1977

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