Thank JWD for spotting this ;'Mark Kudarauskas 1983 "Zee Truth" speed disc. 80 E mold Whammo in Gold Hotstamp. It's weight at is probably 165 grams. It has Marks name, BOSTYLE Massachusetts, and 1983 on the hotstamp. The object is to determine your speed of your "z's" by looking at the rotation of the logo.' My question is ; how can you see the hotstamp when it's in flight?


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