Bought on (Swedish) eBay for nothing a nice Zeiss Ikon Nettar (Novar Anastiigmat 1:6,3/75 mm). It turned out to contain an exposed Kodak Verichrome film. Developed it strongly in D-76 and mixed some Farmer reducer to handle the quite heavy fog. Looking at the pictures it seems to belong to late 1950, or early 1960. (the printed letters "Verichrome" from the paper covering the film is seen in the sky!) Mailed the seller, but she paid no interest to the find.
Really like this composition!