Seiko Cal. 6650 - 731

Released in 1973, the Cal. 6650 with design code 731 was part of Seiko's domestic market collection. Powered by the 6650 caliber with 24j jewels beating at 36,000 bph, it delivers a 60 hours power reserve. [seikata-wm-2d9ec71300c2]

Also known as: Bullhead, UFO

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

10.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1973

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