Just had a long and interesting conversation with one of my old, long serving, now retired RM Armourer colleagues. L42's were his bread and butter since they came on stream and it was he who went on to teach REME/RM the then new L96 at Lympstone/Plymouth and Bordon. Sent him the pictures of the mounts and guess what? Nope, never seen them in RM service and has no record or mention of them in his records. In fact, as soon as he saw the pictures his comments about eye relief were exactly the same as mine. However, he did accept that there were trials during the time - NOT concerning the RM - of another but more complicated US made telescope (which he called the Leatherman!)
Has anyone out there got documented or substantiated proof of an RM connection using this bracket?