BELGIAN CONGO
Air Mail Proof Specimen 1920 Air 1f. (3), 2f. (3) and 5f. (2) imperforate printer's samples in issued colours, each perforated "SPECIMEN".
Details
Air Mail Proof Specimen 1920 Air 1f. (3), 2f. (3) and 5f. (2) imperforate printer's samples in issued colours, each perforated "SPECIMEN".