Seiko Cal. 4577 - 338

This Spring Drive model from 1981 features a 46mm Gold-Plated case. The Bidirectional bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-2ee1492b4080]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

10.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Green

Jewels

19j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1981

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