Lot 20270 – 1964 Romanesque Art in Austria 1s50 in complete sh

1964 Romanesque Art in Austria 1s50 in complete sheets in proof colours in grey-black & dark black (this sheet with strongly striking through print) on phosphor paper plus 1 sheet in original colour bluish-black, counted as Michel no.1151P the cat. value would be €80’000 for the 2 proof sheets, thus very rare and to our knowledge offered for the 1st time (ANK 1181F?)