Biskupin October 01, 2012 1966 bronze cachet ceramic Iron Age museum Poland postal stationery postcard postcrossing +
Hadrian's Wall October 01, 2012 1986 1993 2005 2009 aerogramme Australia booklet bronze Great Britain Italy joint issue maxicard PHQ postcrossing unesco +
Archaeology March 07, 2011 2009 2010 2011 bronze Bronze Age glass Iron Age mini sheet ofdc Slovenia +
Archaeological Discoveries February 06, 2011 1972 1973 1974 1975 antler bronze Bronze Age ceramic gold ofdc semi postal slogan cancel Switzerland +