Seiko Cal. 6681 - 999

The Seiko 6681-999 represents an important milestone in Seiko's 1973 lineup. The Bidirectional bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-f68f95c6dad5]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

10.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1973

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