Canadian sherman

[Don Dingwall]

Possibly could be Poland. They have a book out on the Sexton and Grizzly, but they were outside in that volume, near some sort of fort or castle.
I say Poland because you can just see the next tank to it has T34 pattern track.
Just a hunch.

And by the way Dave, FWIW, NEVER consider a museum vehicle a reliable reference item for anything, especially markings.
Those ones in the pic look bogus.

Don