From the Nemesis Ancient Coins vcoins.com store:
http://www.vcoins.com/ancient/nemesis/store/dynamicIndex.asp

                  Caracalla Æ 17 Hadrianopolis Hercules


                  Obverse: bust right 
                  Reverse: Hercules standing right with club & lion skin
                        17mm - 3.5 grams

                        Price 
                          US$ 17.99  € 14.34
                         £ 9.77
                         AUD$ 23.52
                         CHF 22.11
                         CAD$ 21.38

                        Rates for 9/2/2005