Seiko Cal. 6647 - 183

Released in 1972, the Cal. 6647 with design code 183 was part of Seiko's domestic market collection. The Coin-Edge bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-a57cab7ed1d2]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

12.3mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1972

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