1891 Registered Cover to Switzerland,large envelope franked front side with 2kr Orange perf 12, 3 (Kr) Deep green perf 13, 10 (Kr) Blue perf 10½, on back with 2kr Orange, 3kr Green (5 each) which are also used as security seals, all the stamps tied by strikes of K. MILIT. POST VIII/ TRAVNIK 11/11/91 cancels, registry handstamp, cover open for display and with some small faults but still an appealing use