This is an advertisement for the Kryptonite motorcycle lock from 1983. I'm not 100 percent certain, but I believe this is the same Kryptonite U-lock or D-lock that was later discovered to be vulnerable to the ball point pen hack. The lock used a round barrel key to lock and unlock the lock mechanism, and if you take the cap off the end of a Bic ball point pen, and insert it into the lock groove (where the lock pins are located), and begin applying rotational force and moving the pen body around (it takes a little force), it will eventually open the lock.
Everyone thought a lock that used a round barrel key must be more secure, but then someone came along and found that you can open it with a ball point pen. Not all locks of this type are vulnerable to this hack. Harley Davidson uses barrel locks/keys on some of its models, but the pen hack won't work.
