From the few I've come across I was under the impression that the Formidar's & Recomar's either had Nagel-Doppel Anastigmat f/4.5 135mm, Nagel Laudar f4.5 135mm, and later Kodak Anastigmatic f4.5 135mm's and alternatively the top versions having Tessar or Xenar f4.5 135mm lenses.

Ian