The Wellington Gems (1977) [London, Market, S.J. Phillips]: 420.2
Comments: SET IN A NECKLACE WITH ELEVEN INTAGLIOS. SEE ALSO THE DRAWING IN THE MUSEO POLDI PEZZOLI, BY VIMERCATI SOZZI PAOLO (1801/ 1883), A DESIGN BY BELTRAMI. OTHER GEMS ARE COPIES FROM THE PONIATOWSKI COLLECTION. HTTP://WWW.LOMBARDIABENICULTURALI.IT/OPERE-ARTE/SCHEDE/2O050-00165/