These are very cool padlocks. I have two Clarke combinaiton padlocks and they are near the top of my favorites.
This padlock had a high bid of $533 (Plus $5.20 Shipping).The Clarke Combination Padlock manufactured in Baltimore, MD. Solid brass construction with patent dates of 1873 and re-issued 1876. The lock measures about 3 1/4" tall X 2 1/4" wide X 1 1/4" thick. There are 12 buttons marked A-I & L,O,U used to set the combination. It is marked on the back 1873 and 1876 patent dates. Do not have a combination. Very hard combination padlock to find. Guaranteed old. - eBay (15 Nov 2011)