Unusual Padlock has a round combination dial at the top with #s 0 - 20, 5 reels in the center with numbers on 4 of them from 1 - 9 and a little box at the bottom that pulls out. the side has a keyhole. Front says multacc Corporation and has number 722851 on it. From reading about it in the patent info I believe it can take different keys and each key can have it's own combination. I think you might have to know one of the combinations to make your particular key work and then another combo to open the lock but please look up the patent info - U.S. Patent No. 4325240 is on the back of the lock. Don't know if it works, does rattle, came from lock collectors estate. Lock is unlocked now. Normal wear, finish is chipped up and scratched. T is a large label on the key side that is worn. Body of lock measures about 4" by 3" by 1 1/2". Hasp is about 2" tall and covered with black plastic. Dials all turn fine. Lock is heavy. Winner will pay actual postage based on carefully packed weight of 4lbs. Payment by Paypal, check or money order is accepted. Ins avail at your option. Please see the other items I have listed, I will combine multiple purchases to help save on shipping. Email if any questions. The free listing tool. List your items fast and easy and manage your active items.