Matching magazine question

[Tony Sandrin]

Considering how much value is added to a matching magazine/Luger set, and how tough it can be to find a matching set, would it have been common for the magazines to be mismatched during the war? I know that Third Reich produced P08s were issued with two magazines, but I wonder how often they would have been mismatched during training, range days, in the field, etc.

So, historically speaking, would most of the issued Lugers have made it through the war with their factory matched mags and they just ended up being mismatched post-war or would a large amount have been mismatched while in service use? Is there any hard evidence to support either of these theories?