Anything in advertising paraphernalia pertaining to Nipper the HMV dog!
Anything original carrying the symbol of 'Nipper' the HMV dog, particularly Nipper figurines(in papier-mache not resin or plaster- those are reproductions), original shop prints of the trademark, advertising lighting fittings, clocks, signboards, record-display racks, posters or whatever you come across!, I want them!