"Preserving the Poles" Souvenir Sheet (picture 1) issued by Canada Post, "Melting Glaciers" Miniature Sheet (picture 2) issued by Finland Post, "120th Anniversary of the International Labour Day" Stamp Set of 2 (picture 3) issued by Macao Post and "World Heritage - Germany" Datestamped First Day Cover with Stamp Set (Triple-Cancelled) (picture 4) issued by UNPA.   Close