Seiko Cal. 6647 - 904

The 6647-904 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6647 caliber with 21j jewels beating at 21,600 bph, it delivers a 57 hours power reserve. [seikata-wm-fc99a033a601]

Also known as: UFO, Sportsmatic

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

41mm

Case Thickness

9.0mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Champagne

Jewels

21j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1990

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