In a batch of mounting rings I bought recently mainly for my pillbox lenses and one for my Petzvals, appeared to have upon closer inspection a TT&H inscription. Apparently it is meant for a big lens since its internal diameter is about 3.392 inch (86,19mm). It has a coarse thread of 12 TPI.
My (short) search couldn't trace a lens that big by TT&H....
Any of you have one or a catalogue or other source?
thanks
Many thanks Martie; your source made it quite easy to ascertain which lenses would fit this specific mounting ring (in the catalogue mentioned as 'flange screw'. Considering the catalogue only uses whole and half inch dimensions, my ring should be the 3,5 inch ring, which mounts to: