1958 MAIL AUSTRIA TO FELIXSTOWE/UK ½D WILDINGS NOT VALID FOR POSTAGE. Envelope Austria to Felixstowe Suffolk with Wilding ½d x 2 affixed but not valid for postage and cancelled UK triangular 'I.S.' hand stamps, alongside KITZBUHEL date stamp 3 3 58. On front UK '4D/I.S.' charge mark in green and 4d postage due cancelled FELIXSTOWE SUFFOLK 6 MR 58. (Ref 118827).