cover 7Kr. Prussian blue showing plate flaw over right-hand "7", with clear to good margins on small 1869 envelope (flap missing) to Vevey, Switzerland, tied by open cogwheel "247" with half circle "KIRCHHEIMBOLANDEN 14/3" d.s. adjacent. A very presentable example of this rarity. Signed Schmitt. M.21c; D.M. 6000. Photo