Seiko Cal. 6647 - 857

Released in 1973, the Cal. 6647 with design code 857 was part of Seiko's domestic market collection. Powered by the 6647 caliber with 27j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-fc8fd6bcb5c9]

Also known as: Navigator, Sea Horse

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

14.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1973

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