Perry Way
Member
As far as plate and rollfilm back compatibility, do some internet digging. If memory serves, The back on your Avus is also compatible with the Zeiss Maximar (Zeiss had at least four different backs) and the Nagel Kodaks. It also seems to be the most common standard of several used at the time. My Suydam rollfilm back states on the packaging "For Voigtlander, Zeiss Maximar and Kodak Recomar"
I took this information and used it to decide on making a purchase of three film holders for the Kodak Recomar by one of the top dollar sellers on eBay. He had plate holders for Zeiss, and a couple film packs for Voigtlander and those were expensive (in my mind), and then there were these three Kodak Recomar film holders and they were cheep by comparison so I bought them risking like all of $19 including shipping.
Now I received them this morning. During lunch slipped one on my Avus and it's a perfect fit! Here's a photo to prove it. So there probably are some variances along the way with product lines, maybe there's some Recomar film holders that won't work, but these do!