I find that the adjusting tool is suspiciously weathered to a degree not unlike the rifle itself, at least in the photo above. If it remained unfound for all those many extra years, it ought to be in much worse shape, no?
Going back to Warren's point about the degree of corrosion on the scope adjusting tool; yes, I'd concur. It does not really look corroded enough to have been buried in a French ditch for over half a century. I just got back from spending much of the last week field walking on The Somme. OK I know the stuff over there has been buried near enough a century now, but I've done a fair amount of mucking about in Normandy, at Dunkirk etc., & unless there was very little oxygen in a rather chalky alkaline soil, I think the deterioration would be much worse. Just my .02c.
ATB
I don't think Warren would like it getting us confused!