Heinrich Köhler 384 Auction – Day 2 Single Lots & Airmail and Zeppelin Mail – inclusive the collection of the Sieger family

Olympic issue 3 c., the unique large die trial color proof in unissued colour carmine, on India paper, on sunken card, black control number "70020" on reverse. Very fine and choice. From the collection of John Eissler, who was the engraver of the vignette. (Scott 718TC1a)
Provenance: Robert A.Siegel 'Rarities of the world' (2009)