I just purchased a Wollensak 3.5"/90mm f/12.5 lens in a Rapax shutter. It came mounted on a small recessed lens board and I need to move it to a lens board I can use on my cameras. My normal lens spanner wrench will not work on this retaining ring.
Rather than having two rectangular slots on opposite sides, this ring has three small holes evenly spaced (34mm) around the flat surface of the ring. Where can I buy a wrench that will allow me to loosen and tighten this type of retaining ring?
Alternatively, I may have a local camera repair shop remove the ring, but then I need to find a replacement of the proper size and threading with which I can use my spanner wrench.
I'm looking for suggestions and solutions for this older lens.