I like parking meters. The Duncan Miller meter locks are perfect for opening without drilling. I have a chisel that fits perfect in the lock. With a hammer I give it some love taps and turn the chisel with a wrench. Eventually with the proper amount of love it turns open. Lock is no longer able to lock but with some JB Weld I can piece it together and make it look good and open with a screwdriver. Those round security locks are a pain and I have no other way than drilling. I don't like to so I have a couple that are waiting. The top (M/W shaped) locks to the POM's are usually all keyed alike. Email me and I'll see what I can do.
Mike