Scott 28b, UNUSED, PF Cert, EXCEEDINGLY RARE STAMP!

Scott 28b, *UNUSED*, PF Cert., stating "regummed with two diagonal creases." A certified unused Scott 28b is EXTREMELY RARE. PSE Population Report shows zero listings and the PF Cert Search returns only 3 stamps.

AN EXCEEDINGLY RARE STAMP!
CV $20,000 (for no gum)