These machines are also known as Westinghouse Multi-drink machines (WH MD). Comes with 2 keys.

If you need to remove a lock like this follow these instructions:  Start in the very center of the lock with a 1/8" drill bit.  Mark your drill bit and drill in about 5/8".  Then go up a size in drill bit and drill in about 1/2".  Repeat until you get to 5/16 drill bit.  At this point remove the rest of the pins with a small set of needle nose pliers.  Stick a large screw into the center where you did the first hole that was deeper and twist either left or right.  This can differ depending on how the lock was put in.  DO NOT bore all the way through the lock.  Machines that use this lock use linkages and if the linkage drops it will be a real bear to open the door.