Very rare, unpriced by SG. Those two are just singles though, this one having the sheet margin with control letter "O" is much rarer. Mint never hinged, the slightest of toning on the rear plus a faint small corner bend mentioned just for accuracy. A normal stamp included for comparison.
The item "1883 Penny Lilac BLUED PAPER RARE MNH Control SG 173g Scott 89b CERTIFICATE" is in sale since Thursday, August 26, 2021. This item is in the category "Stamps\Great Britain\Victoria\Surface-Printed Issues". The seller is "goodladm" and is located in Alford. This item can be shipped worldwide.