No Longer Available - GB 1929 SG417var Proof of Experimental plate

Stock Code: G1455020

1929 10s "Seahorse" Experimental plate proof. Very fine huge margin imperforate vertical strip of 3½ rolled impressions with outer frame lines incomplete, printed in black on thick wove card at the Royal mint as an experiment into alternative methods of plate production. Endorsed in pencil manuscript "Copper plate after polishing and burnishing 18/11/29". Aspectacular new "Seahorse" discovery and a unique dated piece to be listed in the next Specialised Volume 2 catalogue


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