Seiko Cal. 3866 - 521

This Spring Drive model from 1981 features a 40mm PVD Black case. It features a Cream dial protected by a Hardlex crystal and offers 110m of water resistance. [seikata-wm-506e28df0f94]

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

13.4mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Cream

Jewels

24j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1981

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