1811 "Franco Oldenburg" red two-line cancel in French letter manner, clean and straight on slightly toned folded letter with black two-line cancel "Bremen" (inside dated "27 Juny 1811") to Norden in Eastern Friesland, with in each case coated Franco and postage taxe "5", this cancel is a major rarity, the quotation in the Knauer / Salm, number 63 does without each base. important document from the French period