1929 UNDERPAID MAIL LIVERPOOL TO SWITZERLAND. Envelope Liverpool to Zurich, Switzerland with 1½d P.U.C. (SG436) cancelled OLD SWAN L'POOL 1 JUN 29, postage underpaid and with "Refuse" label with Swiss 25c postage due cancelled ZURICH 3 VI 29. 1½d with 'MLL' perfin (Meccano Ltd Liverpool) and on reverse flap imprint of "MECCANO LTD/LIVERPOOL". (Ref 108250).