To be really truly honest Strangely......... and in a word...... No! I cannot imagine in a hundred years a Govt Ordnance Factory supplying a batch of unissued serial numbers to a private company so that they could linish the original numnber OFF the body - and then re-engrave a new serial number on it - so that it looks like it';s........... Nope it's what I'd call following a sharp intake of breath '.....toooooooo dodgy'. Supply new registered bodies, already numbered as the registered and accountable 'master component' that was NEVER supplied or available to Ordnance and NEVER available as a spare part, well, that's another matter but to be wide open to chicanery or dishonest practice.

Re the body 406534, to be honest, that looks like it was engraved by a first week apprentice

There were instances of duplicated numbers, one of them beinbg the V series of Bren guns and when this was picked up, it was circulated in the Information to Quartermasters briefing reports that no one ever read or took any notice of if my experience with No2 pistols and No2 revolvers is anything to go by