Lot 40307 – 1913 Romanov Tercentenary 3k vignette only die proofs (4)

1913 Romanov Tercentenary 3k vignette only die proofs (4), with die A in three states incl. two in carmine on chalk surfaced paper (one with tiny thin) and third in orange (small thins), and die B proof in carmine on buff card, all possibly from the Tsar collection sold by Robson Lowe auction in 1935 – Lot 16 described as “ 3 kopeks, Die A:…. Die proofs of head in carmine, four states” published in the Yamschik-Post Rider 1983, No 12, page 12-13. An exceptional group.