Lot 30157 – 1913 Romanov Tercentenary group of six proofs in blue shades on chalk surfaced paper

1913 Romanov Tercentenary group of six proofs in blue shades on chalk surfaced paper, with the names of designer and engraver beneath the picture, incl. 14k (10 known), 15k (8 known), 20k (not described), 25k (3 known), 35k (7 known) and 50k (not described) values, odd insignificant thin, with the numbers known as described in the Tsar Nicholas II collection sold at Robson Lowe in 1935, published in Yamschik-Postal Rider 1983, No 12, pages 12 to 15, a rare assembly.