The cachet "Geräuchert vom Contumaz-Amte / zu SEMLIN am ... (date)" of the quarantine station of Semlin is found on letters from 1832/33. There was also offered a letter of 1835 with this caches at an auction but the date of the cachet was not clear…
Good news. I found photographs of the same seal in the book "Österreichische und ungarische Posteinrichtungen in den Donaufürstentümern 1782-1880" (Part 1, page 144) by Dr. G. Gmach. The seal was found on letters from Constantinople to Triest and…
Posted the thread From national health care to WHO (exhibition collection).ThreadThe exhibition collection "From national health care to WHO" from Irmgard Fürstenberg can be viewed here.
According to Meyer ("Disinfected Mail", page 67/68) main Type H was used from 1858 to 1860.
The picture shows a letter from Constantinople (June 2nd, 1858) to Vienna. There are no rastel or cachets.
The postage is for a double weight letter: