Persia. 1905. Registered postal stationery envelope 6c ultramarine upgraded with Yvert 233, 1c on 1k violet (pair) tied by oval Teheran date stamp addressed to Germany with 'Von Auslande/ uber Bp 4' registration label with 'Berlin-Oesterr/ Bahnpost/ Zug' transit '5th April 05' and Berlin receiver on reverse. Beautiful and scarce item.