[George Anderson]

Originally Posted by alanint

These are forged, "Matching" magazines. For starters, as noted, 42's had plastic bottomed, non serialed magazines. Secondly, both your magazines show the "+" of the spare mag, which would not be correct and lastly, they each have different letter suffixes, with would not be correct either.
Someone ruined someone else's hope of ever finding the matching mags for at least two pistols. Sadder still as they are both SE/63 proofed.

Many 42's had serial aluminum based mags. But as Alanint notes, both of these are faked. Even overlooking a plus(+) on each, the numbers are upside-down.