Bulgaria. 1919 (April-Dec) Three covers/card from Sofia to Italy bearing different frankings tied by the P.M. 15 cds in Constantinople, all carried through the Orient Express from Sofia to Constantinople. A scarce and interesting trio. (Image)

1922 (May 4) Cover from the Greek-Bulgarian Boundary Commission with letter of the President sent from Paris to Carlo Levi, Lieutenant Colonel in the General Staff of the Royal Army in Rome, in the letter stating that the Conference of Ambassadors decided that "our documents will be signed in Paris (tomorrow), the missing Commissioners were replaced for officers through ambassadors". (Image)