1900-1910 2nd Fl. Mercury issue: 2x5l. postal cards, 5x10l. cards, 5l.+5l. double card, 10l. card (with paid answer) and 10l+10l double card. A total of 9 different postal cards, 4 of them unused. Very fine. (Hellas PC18a+PC18e+PC19ab+PC19ba+PC19bb+PC19bc+PC20+PC21aaA+PC21ba).