Seiko Cal. 6663 - 783

The Seiko 6663-783 represents an important milestone in Seiko's 1975 lineup. Powered by the 6663 caliber with 18j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-993ebe90cd21]

Also known as: Tuna, UFO

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

10.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1975

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