Seiko Cal. 6688 - 778

The Seiko 6688-778 represents an important milestone in Seiko's 1991 lineup. Powered by the 6688 caliber with 29j jewels beating at 21,600 bph, it delivers a 43 hours power reserve. [seikata-wm-8c7291352792]

Also known as: Sumo, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

13.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Champagne

Jewels

29j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1991

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