Seiko Cal. 5666 - 381

Released in 1967, the Cal. 5666 with design code 381 was part of Seiko's domestic market collection. It features a Black dial protected by a Hardlex crystal and offers 50m of water resistance. [seikata-wm-55c59ddf44a8]

Also known as: Bellmatic, Emperor

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

10.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Black

Jewels

32j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1967

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