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Expert Presentation: Return Labels
This expert presentation was made by Paul de Leeuw van Weenen on January 10, 2026. Download a PDF copy of[...]
Expert Presentation: 1871 Lithos & Engraved: How to Differentiate the Two Printings (Csaba Kohalmi)
Watch the expert presentation by Csaba Kohalmi, made on on 10/30/2021: Download the PowerPoint CLICK HERE to download the PowerPoint[...]
Expert Presentation: Altering Hungarian Cancels after the 1918–19 Breakup (Johan Sevenhuijsen)
Watch the expert presentation by Johan Sevenhuijsen, made on 11/12/2022: Download the PowerPoint CLICK HERE to download the PowerPoint presentation[...]