Seiko Cal. 6688 - 647

The Seiko 6688-647 represents an important milestone in Seiko's 1970 lineup. The Bidirectional bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-378540fc1207]

Also known as: Bullhead, Crown

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

10.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Cream

Jewels

25j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1970

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