Seiko Cal. 3866 - 506

This Spring Drive model from 1975 features a 38mm Gold-Plated case. It features a Burgundy dial protected by a Acrylic crystal and offers 140m of water resistance. [seikata-wm-5ba51415a7e2]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

9.5mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

140m

Dial Color

Burgundy

Jewels

26j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1975

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