For their 50th anniversary, the Halibrand company cast a hundred or so special commemorative clocks using the molds for the unique wheels on Mickey Thompsons Challenger I land speed car. These clocks were cast in actual light weight magnesium just like the original wheels and are the same size. This is serial number 73. Edge to edge it is just shy of 24" and 3.25 inches deep. This one is in very nice condition but will need a replacement clock motor. I use a bulk rate shipping service so shipping won't be as expensive a most people think.