“12th INTERNATIONAL CONGRESS OF MEDICINE MOSCOW 8 AUG. 1897” on reverse of a 3 k. postal stationery reply card, the indicium used with “MOSCOW 8 VIII 1897 CITY POST" and locally addressed to “Poste restante (manège)”, very fine and extremely rare, also a printed envelope with heading in French “XII CONGRÈS INTERMATIONAL DE MÉDECINE Moscou 19-26 Aout 1897.” sent registered with cds. “MOSCOW 18 VII 1897” to Rotterdam with arrival cds., fine. A unique duo
