ADVERTISEMENT PROOF 'HEARING AIDS' 1972 25P BOOKLET. A very fine proof in black on gloss paper mounted on a thick card of the 'HEARING AIDS - a look at prices' mounted on thick card (111 x 99) with manuscript endorsement 'SET AS THIS IN TYPE FACES WE HAVE NEAREST TO THOSE USED HERE'. Advert appears in the June 1972 25p booklet. Unusual. (Ref 122225).