That's a very nice stock and nicely figured. The stock design does not look like a standard Mauser M03 design to me, at least from the web site photos of the different models. Perhaps a custom designed stock from Mauser for the original orderer?

The engraving looks pretty good too and nicely done.

A good find and addition. Well done.

If I ever get a custom made stock made up would probably go for similar design. As it is similar to the Mauser synthetic stock I have and would probably match it in some ways. I might go for a slightly slimmer fore-end. Don't know till I do it.