I dont like it, I think the material is wrong, the lining dosnt look right and nor does the insignia. I suspect its a complete fake.
To me it looked heavily tailored. You can see the belt loop holes in the front have been closed. I think it was an original tunic that was tailored after the war and then someone tried to save it later on?
I think original but as put heavyly tailored , looks like replacement top pockets have been added also