It does look like the back of a Tiger 1 turret, if you compare the lifting peg position and brackets to this picture of the Vimoutiers tiger.
if it’s an original turret I don’t know, but after having worked on a couple of German vehicles and meet some of the larger collectors I think it could be very plausible that’s it is indeed a tiger turret , there is still quite a lot of German stuff around but it not as public still, as allied stuff, and it’s bloody expensive.