Lot 50273 – 1913 Romanov Tercentenary 50k complete die proof in

1913 Romanov Tercentenary 50k complete die proof in grey, with the names of designer and engraver beneath the picture, very fine. Possibly unique, not described in the Tsar collection R. Lowe 1935 as published in the Yamschik-Post Rider 1983, No 12, page 15.