Lot 10411 – 1924 50c Olympics unissued design die proof in dark blue and light blue on thin vertically ribbed paper

1924 50c Olympics unissued design (depicting the Roman arena in Nemes) die proof in dark blue and light blue on thin vertically ribbed paper, with embossed impression of the printing die and positioning pin holes either side, signed at the lower right by the designer E. Becker, fine, signed J. F. Brun