Lot 30052 – 1913 Romanov Tercentenary 15k frame only final die proof in brown-purple

1913 Romanov Tercentenary 15k frame only final die proof in brown-purple, showing printing plate pinholes with the names of designer and engraver beneath the picture, small thin otherwise fine. Probably unique, no description in the Yamschik-Post Rider 1983, No 12, page 14.