A PHILATELIC INCUNABULA RARITY 1864, "Katalog über alle seit 1840 bis 1864 erschienen Briefmarken, welche zu den beigefügten Verkaufspreisen durch Wilhelm Georg in Basel bezogen werden können", all world stamps catalogue by Wilhelm Georg from Basel, printed by H. Georg's Verlag ; the first stamp catalogue of Switzerland, illustrated in "Milestones of the Philatelic Literature of the 19th Century" by Massen and Schouberechts on page 76, a major bibliophile rarity representing the first stamp catalogue of Switzerland Note: At that time the "Post Office" issue of Mauritius was still unrecorded, or the "Zürich 4" was then estimated at the same price as the "Zürich 6" or the "Wade 4" (each at 1Fr50!) (Image)