Fresh from my personal collection.
Here is one of the finest antique miniature combination locks ever made. I estimate the chain to be 11 - 12 inches in length, while the lock body is only 1/2 inch thick and 3/4 inches in diameter. It takes a four number combination, however I do not have the combo for this. - eBay (11 June 2010)
This padlock had a high bid of $292 (Plus $4.95 Shipping).