Bidspirit auction | Imperial Russia - Proofs from

Imperial Russia - Proofs from the Tsar Collection - 1913, Tercentenary of the Romanov Dynasty, Elizabeth Petrovna, imperforated large die proof of 50k in dark ultra, printed on chalk-surfaced thick paper, size 39x47mm, previously hinged, no thins or any hidden defects, VF, proofs of 50k are very rare, especially in ultramarine, Est. $1,500-$2,000, Sc. #99