I bought a German edition of the full Agfa Catalogue for 1939 recently. Both the Rondinax tanks appear but in the list of contents are shown as ‘Rodinax’, a common spelling mistake today on eBay. It appears to be a dealer’s catalogue. Cameras include the Agfa Karat 4.5 and 3.5 both of which, with their 12-exposure 35 mm cassettes, were popular second-hand items in Britain during the 1950s. My father and I had both the 4.5 and 3.5 at one time.  Self-processed Ferraniacolor was then the popular choice but not in the Rondinax because there was no transparent reel in the tank needed for reversal exposure. Transparent reels in the Rondinax tanks came later.