Seiko Cal. 4557 - 633

This Spring Drive model from 1977 features a 40mm Gold-Plated case. It features a Cream dial protected by a Acrylic crystal and offers 150m of water resistance. [seikata-wm-390f8ca95f73]

Also known as: Helmet, UFO

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

12.3mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

150m

Dial Color

Cream

Jewels

25j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1977

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