Seiko Cal. 5668 - 738

The Seiko 5668-738 represents an important milestone in Seiko's 1975 lineup. The Coin-Edge bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-b0855006226e]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

12.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Black

Jewels

31j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1975

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