Wolf Dog Stirrup Cup Goblet

I found this at a local antique store.  I have seen several of these cups on ebay and I think they are called a stirrup cup.  The ones I have seen are usually marked with Gucci on one side and Italy on the other.  The only markings on this cup is Italy M/M.  This is located on the back of the head of the animal.  I would like to find out who made this cup and any other information.  I think this is a really cool looking cup and a great conversation piece.  Any help and apprasial would be greatly appreciated!