Mystery No.32 Mk3 variation - solved!

[Surpmil]

.... The numbers looked "different" like maybe they were overstamped and my thought was that the guy that buffed the heck out of it and reblued it restamped the numbers because he buffed the heck out of it.

Here are a few pics of the other numbers on it

At first glance the numbers do look very similar, but the loop on the threes is quite different on the bracket.

Of course, who could have known the 'correct' numbers to stamp on either rifle or bracket until this documentation surfaced?

MUST be genuine IMO.