Many thanks shilly. In fact I have a passion for The Great War myself, & spend a lot of time over on The Somme (but not enough!) specifically, & The Western Front generally. The picture of me on the roof of a bunker in my profile was actually taken in Bourlon Wood on The Hindenburg Line defences last year. Your scope looks to me as though perhaps your father or whoever he got it from may have made (or had made) the mounts so that it could be used on a self-loader, back in the days when the average Joe could still legally own one in functional condition. Sadly, since Hungerford, long gone...

Thanks for bearing me in mind.

ATB