Back-of-the-Book Proof & Specimen Collection. Various sets mounted on album pages; includes a complete set of Official card proofs and a few India proof sets, 13 different Atlanta proof sets, 1st issue Postage Due card and India sets, 1865 & 1875 Newspaper card proofs and the 1875 Specimen set; Scott cat $8,050. Estimate  $3,000 - 4,000. $0