But wait! There's more. As Sheldon says in his Bible, it's all about the ISO.
Here we have "Standard" British Roadster Tyres.
View attachment 804165
See? 28X1-1/2.
View attachment 804166 28 x 1 1/2 635 mm English, Dutch, Chinese, Indian Rod-brake
roadsters
(Also marked F10, F25, 700 B)
If the tyre says Canadian Size, you can bet it's in reference and respect to the Queen, right?
View attachment 804163
NOPE! It's an F.13, and we all know what that means, "F'n unlucky!
622 mm (F.13) Rare Canadian designation
28 x 1 5/8 x
1 1/4 Northern European designation for the 622 mm (700 C) size
See, it says it right there, Jointless 28X1-3/4 F.13
View attachment 804162
PALMER MADE IN ENGLAND
View attachment 804161
It wouldn't be a problem if it weren't for the fact that the other wheel is an honest to goodness, non-Canadian, 28X1-1/2(635) British Roadster rim and tyre. I'm in luck though. Schwalbe make a matching pair of 622/635 tires. Two in fact. The Delta and The Marathon.