PRISONER'S OF WAR FREE-FRANK POSTCARDS: 1917-19, 48 specially printed postcards, over 50% are from Czech prisoners addressed to Bohemia and Moravia, each one bearing two-country censorship markings, most originated from various towns of European part of Russia, occasional flaws possible, generally F/VF. Most of these POW became a part of the 1st Czechoslovak Corps, which was involved in various hostilities during Civil War in Russia