So does mine Roger. One examiner's mark on either side of the bolt way. It also has "S" on the cutoff block, does yours? The TR stamps were later struck through, but are still clearly visible.
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Sounds like ours are pretty much identical. It came to me years ago from where I can no longer remember, & it has been in the 'when I get round to it' pile for that long too! I suppose now I've little excuse, so I must assemble it into a complete rifle; it is worthy of a place in the rifle rack in its own right, I guess??