Thanks again Tony for the scans.
Cjd, thanks for the quote.
I have an old 1997 DarnellStamps of Canada Catalogue
which lists Canadian Varieties (E.F.O's) thus:
1.- Constant varieties
2.- Inconstant varieties
3.- Tagging varieties
4.- Paper varieties
5.- Comparative varieties
6.- Colour varieties
7.- Offset varieties
8.- Smudges and smears varieties
9.- Paper folds
10- Perforation varieties
11- Oddities and freaks.
Clear as mud.
