HHmm, the builder used a flat washer under the back rivet.
IMO the shell is fake too, the air vents seems positioned too high.
Looks like a Finnish Military rebuild,liner is leather, possibly finnish,as are the rivets.Arsenal/ painted for civilian use/fire Dept,etc.
I would run away from that as fast as shit off a shovel ,,, rgds Dave
Still,out of curiosity...How much$$?
Why waist your time on a piece of junk?
Heck,people go out and buy repro stuff all the time.If it's cheap and still 'somewhat' authentic,why not? I'm not saying to buy or sell it under devious intentions.