So here is a couple of scans what appears to be a mint OG fiume number 20.


(Let me know if I need to get a better scan)
I wonder if this is forgery or been altered in any way? Is it work sending in to get a cert?
I have my doubt I own a $6000 stamp just because I'm not that lucky.
If it would end up being real I'm looking to sell most my mints to feed my Canadian Used habit while I'm off for back surgery. Since I'll be off work I need to come up with funds some way to pass my days

So let the experts comment in. I'll be posting some of my other rare stamps I may have.
Many Thanks,
Joe
PS. if its a forgery is it a good one and do forgeries have any value?