Bidspirit auction | Portugal 1965 1st Centenary of

Portugal 1965 1st Centenary of the International Telecommunication Union. MF953a, 1$00, polychrome, plain paper, perforated 13 ½. Mint copy **, with original gum without hinge, without defects or repairs, with good color and with the INVERTED CENTER. Catalog value € 6,000. A reference piece of errors from Portugal's modern period. Apparently, only one sheet was made, of which only a few mint copies would have remained. Very rare.