Seiko Cal. 5668 - 388

The Seiko 5668-388 represents an important milestone in Seiko's 1966 lineup. It features a Black dial protected by a Hardlex crystal and offers 50m of water resistance. [seikata-wm-e033acbb7a9b]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

9.6mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

50m

Dial Color

Black

Jewels

33j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1966

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