Belgium 1946 - -10% overprint - 'Uitgifte Van Acker' - all 61 stamps, including Gellingen + 2 with incorrect - OBP/COB 724A/24Q + 724R/24T + 724X/24W + 724a/24vv + 2 FOUTIEVE OPDRUKKEN
Belgium 1968 - Erinnofilie - "Olympic Games in Mexico" - block with partially missing print - OBP/COB E103 met UNIEKE drukfout
Belgium 1925/1928 - 4 complete volumes with, among others, "First Orval and 75th Birthday" - OBP/COB 221/272