Seiko Cal. 4528 - 556

This Spring Drive model from 1990 features a 39mm PVD Black case. It features a Cream dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-0a0153b89af2]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

12.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Cream

Jewels

34j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1990

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