Sorry for the pictures, but that's what a friend could send me. The lens doesn't seem to have any other engraving than Portrait Nº2. The body and tripod are in really good shape.
The machining and especially the little 'relief' right where the outer barrel meets the inner barrel in the center looks very "Darlot" to me. You might learn more when you have it if you take the front glass out of the barrel you may find pencil markings on the side of the cemented elements. Darlot did that a lot. Looks like a home made apparatus. Maybe an 8" lens for quarter plate size. Just guessing from the pics. Let us know if it gets into your hands.
Thank's for the advices. How much do you think is a good price for that equipment? I'm really new to this. I just started experimenting with soviet lenses on my mirrorless camera and I'm really happy with the results. Now I have some lenses more for enjoying it's beauty than for using them. I think I might be kicked out of my own house if I come home with this monster, but I'm getting tempted...