As mentioned above, good photos are virtually a must for the many experts in this forum to make reliable evalutations of a particular gun. Outside on an overcast day, no shadows, no flash, as close as possible, sharp focus, wide depth of field (small lens opening- ideal for most lenses is f/8)
I think there is a listing of mags with their numbers on this forum? especially for the purpose of matching mags to guns which have been separated years ago? Or you can use your signature to indicate the number of the mag you need... No 1519.
I'm doing the same, as you can see from my sig. It's a long shot, but a significant boost to the value of your gun if you find that matching mag