Some facts:
Exhibition was at Pantheon Basel from December 4th, 2009 to April 5th, 2010
That Appia is a C86, with "Autolettiga" or ambulance bodywork, done by Lancia, in 1954 and 1955: 22 were built with RHD, 19 with LHD.
This from the very nice catalog of the exhibition, with all the cars present illustrated, which is still available at the Museum Shop.
If you are travelling through Switzerland, the Pantheon is a worthwhile stop before going south to the Gotthard and Italy, or north back home.
There is also a very good restaurant on the premises.
http://pantheonbasel.ch/de/willkommen.htmlIf you use the Pantheon Carfinder on the bottom left of that webpage you will find the info on that Appia from the catalog, and some pictures. Also info on all the other cars present (including a few Lambdas).