Seiko Cal. 6663 - 761

Released in 1971, the Cal. 6663 with design code 761 was part of Seiko's domestic market collection. With its 22mm lug width and 14.1mm profile, it sits comfortably on most wrists. [seikata-wm-ead25dbe8de4]

Also known as: Sumo

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

35mm

Case Thickness

14.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1971

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