I need a flange for a Voigtlander Euryscope 4A (third series, I think). I would prefer to buy a flange from someone that may have a spare, rather than pay to have one fabricated. My caliper says the diameter at the threads is about 86mm. I'm not sure how these thread per inch measurements run with these, if they vary at all, but threads appear to be about 1mm apart. Unfortunately, this lens is *just* larger than the maximum aperture on my universal iris clamp.
I'm in the US, zip code 37076. Let me know if you have one spare and are willing to part with for a reasonable (read "inexpensive") price.