From Glenn Woods' vcoins store:
http://www.vcoins.com/glennwoods/store/dynamicIndex.asp 

            Claudius, 41-54, Billon Tetradrachm, Milne-104, Emmett-74, Year-6, 
            struck 45-46 at Alexandria, 12.82 grams, 23.5 mm. VF

            Obv: Laureate head of Claudius facing right
            Rev: Messalina standing left, holding Nike in right hand
            A nice example that is well centered and struck on a slightly tight 
            flan. Lightly toned and attractive. 
            Price 
                    $ 121.00   € 96,38
                    £ 66,33

                  Rates for 5/20/2005