A theory on the Brit proofs...Sam Cummings stored many millions of guns in the UK when he was running Interarms. British law requires, IIRC, that all cartridge firearms be proofed and if not of English origin, they must undergo proofing in the UK. I would surmise that this is likely a former Interarms piece that was assembled from parts on hand.
A theory ONLY.
Tom A.
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