the top plate looks like it comes down farther, by about half a centimeter, apparently to accomodate the flash socket. Obviously, since you have the original, any fake would have to be incredibly exact to fool you. But if you eleiminated the viewfinder and were able to replace the knobs with something more accurate, I don't think most people would know the difference. Oh yeah, it's got strap lugs as well. You could just call it a fake of a Leica that could have existed, like all the Russian "special edition" fakes 🙂