Designed, painted and signed by Dorothy Knapp. The only one in my book and the only one we have seen. The item “#656 Edison Coil Dorothy Knapp Hand Painted Cachet 1929 FDC Only One Known” is in sale since Thursday, April 23, 2020. This item is in the category “Stamps\United States\Covers\FDCs (pre-1951)\Pre-1930″. The seller is […]