Lot 10410 – 1924 50c Olympics unissued design die proof of the frame only in grey-blue on thin vertically ribbed paper

1924 50c Olympics unissued design (depicting the Roman arena in Nîmes) die proof (stage 2b) of the frame only in grey-blue on thin vertically ribbed paper, with embossed impression of the printing die and positioning pin holes either side, very fine, signed J. F. Brun