cover 1850 handmade paper 1kr. "rose-brown" vertical pair and single with 6kr. brown (plate flaw in crown), all with large even margins, on part E. (some faults) to Vienna, cancelled by straight-line "BELGRAD/5/JUL" d.s. (type 2) and showing Semlin disinfection cachet on reverse. A phenomenal franking to make up the 9 kreuzer rate. One of the most famous and probably the most important Austria first issue cover from Belgrade known. Illustrated in Mirko R. Rasic. "The Postal History of Postage Stamps of Serbia", p.227. Ex "Alexander". Photo in colour