1917 MAIL LONDON TO SWITZERLAND/ADVERTISING. Envelope London to Lausanne, Switzerland (tear at top) with KGV 1d cancelled LONDON 1 SEP 1917, at left very fine illustrated advert in blue "THE STRAND MAGAZINE". Censor label. Postage under paid with tax mark and Swiss 30c postage due cancelled LAUSANNE 6.IX.17. (Ref 103720).