G'Day Fella's,

Mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm Donuts!

Huvius, that is a great looking rifle.

I don't want to rain on your parade, but I believe the reason there are no British or other proof marks, visible on the barrel (at least), is that the rifle looks to have been refinished, and possibly after a new barrel was fitted?
The reason I suggest this is, the number stamps used for the serial number on the barrel, are of a different style/font, from the action serial numbers. If it was original, I would have thought these would have been the same style/font?
This is just an observation.

Now please consider that I am no expert of Mauser firearms and espacially different or unusual types/models, so what I have written above, may be all BS.

Regards
Homer