9 Kreuzer postal stationery envelope, dark brown in octagon, K1 flap mark, short overprint (20 mm) in yellow-green with equal gaps, additional horizontal strip of three Mi. no. 31, 18 Kreuzer franking on foreign letter, triple-ring "REUTLINGEN 18 JAN. 1866", to St. Gallen, Switzerland, arrival on reverse, isolated brownish toning spots, holes at bottom closed on reverse, Mi. 180.- +