cover Austria 1933 (2 July) W.I.P.A. Exhibition 50g. postal stationery card uprated with W.I.P.A. 50g. (+50g.) granite paper and cancelled by the Exhibition cancel; the card is addressed to T.W. Hall (chairman of the R.P.S. expert committee), the reverse signed by R.F.A. Riesco, A.M. Tracey Woodward, Edwin Müller, Emilio and Alberto Bolaffi, A.G. Agyropolous, R. Zoschak, W. von Rachmanow, Nils Strandel, Carrol Chase, Alfred Lichtenstein and E. Dorsey