Thanks folks for all the advice.

The mount wasn't what I was after, it was the tin. I reckoned I could sell the scope, repro mount and tool and get a cheap tin - even if that was a repro. However, I was naïve with regards to the scope. Until I carefully compared it side by side with my own one (and vintage hunter's pics), I was happy enough with it. It will be heading back for a refund - one benefit of buying from a dealer with a 28 day return policy.

Looks like I'll be off to Fleabay or that Frenchicon site for a repro tin at market price

Donald