Billig's Philatelic Handbook, Volume 6, used. Contains an Index for Volumes I-VI, Worldwode Forgeries, Indian States Postal Stationery, Porto Rico overprints on US stamps, list of Polish Post Offices after 1918 and much, much more. Cover shows a bit of wear, tight binding, inside pages are clean and unmarked, gently used. 1949, Volume 6, 211 pages, hardcover, size: 6" x 9".