France 1949 Claude Chappe 10f from International Telephone & Telelgraph Congress set unmounted mint, SG 1072
France 1949 Claude Chappe 10f from International Telephone & Telelgraph Congress set unmounted mint, SG 1072
France 1949 Claude Chappe 10f from International Telephone & Telelgraph Congress set unmounted mint, SG 1072