Thx BA. I must confess I'm less sure about the scope. It's clearly a run of production item that has either lost its markings or for some other reason was not marked. I know from previous comments in this thread that both Surpmil & Warren are aware of a history of some unmarked scopes turning up in Canadasome years ago & I really can't comment on this, but in my experience it is far more likely that the scope is a standard Mk1 that has been skimmed rather than something very rare or 'experimental' that was never marked. If so, I'd admit it doesn't look to have been done recently, but depending on the storage conditions, something done 30 years ago can soon become difficult to tell from something done 70 years ago. You could get hold of a micrometer & drop it across the tube. Oh I also forgot to mention that the bracket is also a genuine (refinished) Rose Brothers example & you can indeed still see the 'JG' examiner's mark on the central 'strut'. The rear top cradle clamp is, IMHO, a 'home made' replacement, or at least, a very heavily worked over piece from another bracket. Note due to the heavy filing or linishing that there is some encroachment into the tapers for the cradle screws. Even so, you have a pretty rare rifle. Maybe some fellow forummers North of the parallel can comment on the scope?
ATB