They are nice cameras, I use Focas, remember this is a unique bayonette mount not
adaptable to Leica, back focus 32mm!!
3000+ made in total, a lot were "Marine National" but there are a lot of fakes.
Difficult to get serviced outside France.
There are also screw thread Focas, a unique 36mm fine pitch thread.
Remember the newest are 40+ years old and if military could have had hard use. New shutter curtains are expensive. I got new ones put in another model recently, cost about £100 on a much simpler camera, they looked good when I bought the camera on ebay, but after firing a few times they ripped in half.
This will go higher in bids!
I often feel they are not really Leica copies, they are quite different in a lot of ways, the screw ones probably owe more to Contax, i.e.
removable back, focussing mount is part of the camera body.