1921 UNDERPAID MAIL FRANCE TO BIRMINGHAM. Post card Boulogne to Birmingham with French stamps on picture side 5c and 10c x 2 cancelled BOULOGNE/PAS DE CALAIS 20-12 21, underpaid (apparently due to length of message!) with UK "1½D/I.S." charge mark and postage dues ½d and 1d cancelled CAMP HILL/BIRMINGHAM date stamps 22 DE 21. Fine usage. (Ref 103934).