Seiko Cal. 6688 - 712

Released in 1971, the Cal. 6688 with design code 712 was part of Seiko's domestic market collection. The Fixed bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-3edad7dfdb45]

Also known as: Sportsmatic, Emperor

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

9.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1971

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