Seiko Cal. 6677 - 660

The Seiko 6677-660 represents an important milestone in Seiko's 1979 lineup. Powered by the 6677 caliber with 34j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-e34e6591b927]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

43mm

Case Thickness

9.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

140m

Dial Color

White

Jewels

34j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1979

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