It doesn't look "Soviet" to me - I actually wondered about the Durst machine printers, but couldn't find anything that matched up with any of the labelling.
Some years ago I visited my local pro lab, Terry the owner had worked for Durst UK, who made the Durst roll-head printers. The company had been founded as Pavelle by Kurt/Curt Jacobson who wrote Developing,, and also Enlarging. Pavelle made processing equipment,as well as enlargers and roll head printers. I think there was a brief name change before the company was bought by Durst. Kurt Jacobson also Patented and produced Pavelle colour paper and chemistry.
Terry had replaced his Durst roll-head printers with a mini-lab, there were 5x4 enlargers in a skip outside (unfortunately damaged), he said there were more he'd save one for me. He gave me two turrets with 5 maybe 6 lenses on each, all Componon or Componon S lenses 50mm 80mm 105mm and 135mm, some marked Durst as the company tested an selected these Schneider lenses, like Linhof. All had grub screws to lock the aperture.
I asked Terry why the grub screws, he explained that on a roll head printer the lenses are fixed focus, for different sized prints you rotate to a different focal length, and change the paper cassette. He said the critical part was with multiple size print orders off the same negatives you had to give exactly the same exposure time, as colour paper suffers from reciprocity failure. So each lens on the turret had it's aperture adjusted an locked set so they all gave the same exposure times. It had been one of Terry's job as a service engineer for Durst UK to set up and calibrate roll head printers.
Lenses are used in many applied applications not just photography, this one is most likely for some industrial application.
Ian
