Mysterious USSR Panoramic Camera Proto

which appeared at Princelle books
using Lubitel lens see at
https://www.thephoblographer.com/2019/11/06/this-mysterious-ussr-prototype-panoramic-camera-is-yours-for-40000/

This is not a prototype. This is selfmade camera (may be made in a workshop, may be made in several copies). Good work but not factory production. This camera has nothing to do with the Soviet optical-mechanical (in fact: defense) industry.