
Here is the magazine itself:

There is hilarity associated with it since it is ungainly and heavy and requires a special tool to load. The point is that it is a collectable accessory for the luger collector. Costs maybe $1500 though I've seen them >$2k.
Anyway, there are fakes. Why, one might ask? The thing has mucho parts and is pressed rather than machined. Why on earth would anyone fake it? More to the point, why would you fake it then fuck it up?
Attendez <----French!!!

Real on top. Fake on bottom.
1-Typeface on bottom is wrong.
2-Serial numbers on bottom add to 17.
Let me repeat that ... whoever made these fakes went to all this trouble then used the wrong typeface AND made the serial numbers add to the same number.
Lulz is my provisional explanation. I await others.
BTW this is a weapon of war and "high capacity" and is illegal in some states
