Seiko Cal. 3866 - 642

Released in 1974, the Cal. 3866 with design code 642 was part of Seiko's domestic market collection. It features a Black dial protected by a Sapphire crystal and offers 30m of water resistance. [seikata-wm-1ac168ae9f85]

Also known as: Monster

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

41mm

Case Thickness

8.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

30m

Dial Color

Black

Jewels

20j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1974

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