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Philately in Action: #54.4
1913 REGISTERED POSTAL STATIONERY ENVELOPES On May 1, 1913, the Hungarian post office issued two postal stationery envelopes with indicia[...]
Expert Presentation: Constant Plate Varieties for the Kolozsvar and Nagyvarad Overprint Issues (Christopher Brainard)
This expert presentation was made by Christopher Brainard on May 13, 2023. Watch the presentation: You can download a PDF[...]