Lot no. 20932

Philately of Tomorrow – Philatelic Research Laboratories (1940), 120 pages, softcover, inside an unreadable dedication; PLUS: The Dealers' Guide to Chemical Restoration of Postage Stamps (42 pages, 1975), to read at the cover page inside: “The Guide is not intended for sale to the General Collecting Public”! PLUS: The Institute for Analytical Philately, Inc.: Proceedings of the Third International Symposium on Analytical Methods in Philately, edited by Susan Smith & John H. Barwis, 2020, 174 pages, with many illustration, in colour, softcover, good condition. Estimate: 60 Euro