Here is a photo of a modern mauser mag, one of those made in teh 70th or 80th.
At least i belives its that.
IT has concentric circles at the floorplate and its not blued, rather plack hard paint.
I dont looks like someone have installed this floorplate to the mag.
Regards HÃ?Â¥kan
http://boards.rennlist.com/upload/mausermag.jpg