Here is the gum side showing together on one scan
the 5 souvenir sheets.
Unitrade catalogue states that Coated Papers gum
has a
slight blue green tinge, which is evident in the scan.
For Peterborough Papers it states that the gum is
greyish;very shinyBut Scott 1527 & 1552 which are on Peterborough Paper have a greenish tinge.
Scott 1604 on PP paper though does have a blue/greyish colour.
Scott 1605 which was printed on Coated Papers paper but wrongly
attributed to Peterborough Papers in my 2016 Unitrade does show the
CP blue-green tinge characteristic quite clearly.
All in all it confirms what Rein has previously said
about not trusting the gum colour to verify the paper maker.
