From the inclinatioroma store at vcoins.com,
http://www.vcoins.com/ancient/inclinatioroma/store/dynamicIndex.asp


                  NERO BI Tetradrachm Alexandria EIRENE 22.8 mm 11.1 gm Fine

                  NERO (54-68 AD) Billon Tetradrachm Alexandria, Egypt. Year 5 = 
                  58-9 AD Laureate head right/Eirene standing right holding 
                  caduceus and helmet.  Koln. 135.  22.8 mm 11.1 gm  Fine.  
                  Struck before the famous conflagration in Rome of 64 AD, and 
                  hence scarcer.

                        Price 
                          US$ 50  € 40.89
                         £ 27.60
                         AUD$ 66.27
                         CHF 62.72
                         CAD$ 62.43

                        Rates for 6/3/2005