Fabio Isman has written about the 45 cases of antiquities returned from Switzerland to Italy ("Sulle tracce del sarcofago misteriosi", Il Messaggero January 31, 2016). I noted the return last month.
It appears that the objects were owned by Robin Symes but placed under an assumed named. Among the finds were Apulian pottery, fragmentary Pompeian wall-paintings and thousands of fragments of the painted interior wall of what appears to be an Etruscan temple.
Isman reminds us of the Symes material that remains in London (see his earlier discussion of this group).