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Belgium: Letters Using High Value Stamps Issued 1929-1936 - Philatelic Database
Belgium 1929 - Complete volume with Large Montenez, Express stamps and others. - OBP/COB 273 t/m 298 inclusief 292C/292H - Catawiki
Rarities - Museum of Philately
Used Special Delivery Stamps for sale
Belgium: Letters Using High Value Stamps Issued 1929-1936 - Philatelic Database
E19 - 20 cent - Special Delivery - MNH - Perf 11 X 10-1/2
Stamps from Belgium - - The free online stampcatalogue with over 500.000 stamps listed.
Special Delivery Stamps for sale
Mint & Unused Stamps – StampsPhilately
Mint & Unused Stamps – StampsPhilately
Rarities - Museum of Philately
Belgium 1931 - Albert with kepi and Queen Elisabeth nurse - OBP 317/24 + 326/32 - Catawiki