Hello Luiz,
To mention your other photos, which are very nice and interesting ... so thank you!
As for the FAG design, I can tell you that I used to have a very rare leather case or FAG Geodesia (but not the camera) and it had the logo that you have shown on the front of it (where the "FED" is on its case). I had bought it on Ebay about 5 years ago. Unfortunately, I did not take photos of it before I gave it to a friend of mine who does have the FAG camera, as a "thank you" gift. I gave it to him because he sent to me a very rare (I would say virtually non-existent) viewfinder for the KIEV SKD Space camera, which I bought from Boris at Arsenal Photo in Germany, but which did not have a viewfinder. Unbelievably, my friend has two KIEV Space cameras and one came with two kinds of viewfinder and so he donated one to me ... a very good friend indeed! (see photo below). Maybe this is the same case you saw?
As for the Helios and Kaleinar with Leica M mounts, I have one of each of them. I also bought them from Boris at Arsenal and there are also photos of them below. The Helios-113 is No. 0000012 and the Kaleinar is No. 9000006. I bought them because it is also thought that they were made to be used on a future version of the FED-6 TTL, and I believe this may have been a plan of FED as I have a photocopy of a letter written by the Director of FED that these two lenses would be available for the FED 6TTL (although he does not specify a type of mount).
In any case, the Kaleinar is fully functional, however, although I have not yet tested it, I have been told that none of the prototype Helios-113 lenses are functional (they only have a back and front element and so will not focus properly. Both of the lenses are exactly like the ones you have pictured! (see photos below).
SKD Space Kiev with donated viewfinder!

FED Helios-113 # 0000012


Kaleinar 5 # 9000006


Regards, Bill