Seiko Cal. 6668 - 306

The Seiko 6668-306 represents an important milestone in Seiko's 1979 lineup. Powered by the 6668 caliber with 34j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-cf173f492aae]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

42mm

Case Thickness

10.6mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

70m

Dial Color

Silver

Jewels

34j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1979

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