Lot 30108 – 1913 Romanov Tercentenary 1 Ruble final design die proof in black-olive on card

1913 Romanov Tercentenary 1 Ruble final design die proof in black-olive on card, without the names of designer and engraver beneath the picture, dated “8/X/10”. Possibly from Tsar collection R. Lowe 1935 as described “1 ruble: … Seven die proofs in different colors with imprint omitted, dated -8/X/10 …” published in the Yamschik-Post Rider 1983, No 12, page 15.