I have also thought about that possibility.. But there is no number on the locking-lever, like on the Astra-stocks.. There is no number on the inner lid either.
And all the small details are identical to a mauser-stock made in the timeframe 1914-1929.
I really think this is a mauser-produced stock, buf can not be sure... But it is no doubt made pre 1945 anyway...
So what can it be??
Here are two pictures of the locking-lever:
http://www.blinkskudd.net/Album/imag.../misc/las3.jpg
http://www.blinkskudd.net/Album/imag.../misc/las4.jpg
As you can see, no number here either.... (So maybe not an Astra-stock??)
I really would like to have this stock identified.. Really irritating to have something you do not know what is...