All stamps photographed. American Stamp Dealer Association (USA). Philatelic Traders Society (UK). Bundesverband des Deutschen Briefmarkenhandels (DE). Nederlandse Vereniging van Postzegelhandelaren (NL). Incredible partly specialised collection in mainly very good condition, mint and used, many issues multiple present incl. The high values, O. Perfs and overprints, collected on perfs and watermarks, on albumpages. Seldom offered so extensive!