Fl. Hermes letter card postd from Corfu (11.3.1904) to Berlin (28.3.1904), fr. with additional stamps 10l+5l Fl.Mercury. Although the 10 lepta printed stamp was not valid for international use and the sender should have affixed on it the stamps needed to pay the 25 lepta fee, he affixed only the additional 15 lepta. The printed stamps nulled, marked "T.10" for the missing rate and noted "20" the aount to be collected. (Hellas PL3Bb).