Eastern Europe, 1860-1928, collection of 4,138 used and unused stamps, incl. Albania, Bosnia, Bulgaria, Czechoslovakia, Yugoslavia, Montenegro, Poland and Serbia, with provisionals, imperforates, pictorials, commems., semi-postals, air post, postage dues, officials, occupation issues, offices, unissued stamps, locals, imperforate varieties, trial color proofs, inverted overprints, Serbian Post in Corfu, faults and reference copies to be expected, most are fine-very fine