Micheal,
The main thing is, that you need to be shure that it is a mag with a wooden bottom of the right style and age.
Recently some Swiss mag's are coming into the market, they are recognizable by the slightly different cutting of the two knobs. If you look closely you can see that at the bottom, the knobs are cut in a circular way, not forming a perfect straight and smooth bottom. These mag's are not always marked with a 'P', as they normally are.
As Huggiebear wrote: Who can't see the difference, may assume the magazine is correct...
Regards,