27th Philatelic Congress of Great Britain 1940 souvenir cover.
Venezuela First Day Cover.
Very scarce use of the world's first postage stamp Penny Black used on first day of valid use, May 6, 1840, tied by red Maltese Cross cancel on folded cover to Warwickshire, brown "C MY-6 1840" first day date stamp on backflap verifies date of use.
Bavaria first day cover 02.11.1849.
Ludendorff Bridge captured Mar 7, 1945.
1948 Gandhi memorial issue first day cover.