Seiko Cal. 6647 - 476

Released in 1969, the Cal. 6647 with design code 476 was part of Seiko's domestic market collection. Powered by the 6647 caliber with 17j jewels beating at 21,600 bph, it delivers a 40 hours power reserve. [seikata-wm-6c45c23bf8ae]

Also known as: Sumo, Silverwave

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

46mm

Case Thickness

12.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Burgundy

Jewels

17j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1969

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