6x17 negatives have curved edge on one end

Cutt off is gone. I took off the two filters (one being jist the ring acting as a small sunshade) and now have a full image with no cut off. Tap on the sample to see the whole file.

thanks to all who offered suggestions and thoughts.

Now I would still like some protection for the front element. Maybe a step up ring from 67mm to 80/82 and then a clear filter would work?