Seiko Cal. 3818 - 556

This Spring Drive model from 1971 features a 41mm Gold-Plated case. The Bidirectional bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-38df22860ade]

Also known as: Turtle, Helmet

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

11.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Cream

Jewels

30j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1971

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