"THE PHILATELY AND USAGE OF ROUMANIA'S POST-CLASSIC ISSUES 1872 - 89" great
vermeil Spain 2000 from Paul Hirsch (United Kingdom)
http://www.japhila.cz/hof/0141/index0141a.htm
and "POSTAL SERVICES IN PRINCIPALITY BULGARIA 1877 - 1908" gold Washington
2006 from Nikolay Penev, Bulgaria:
http://www.japhila.cz/hof/0140/index0140a.htm
We search exhibits from all world, non profit organisation "Exponet"