Seiko Cal. 6661 - 787

This Spring Drive model from 1977 features a 42mm PVD Black case. Powered by the 6661 caliber with 34j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-4ca474c9a83e]

Also known as: UFO, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

11.9mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Black

Jewels

34j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1977

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