"...31st Grey Battalion of Infantry..." Not likely. That's likely just a rack number.
"...indicate surplus to another country..." Only place it'd come from is Britain. No Canadian military kit in those days. Everything was Brit. Assuming your 'DC' mark is supposed to be 'Dominion of Canada', there was no such thing in 1870.
Our own little ray of sun, easy to get in excess of 17000 posts if you just jump in willy nilly and spout garbage....
jan.



























