Originally Posted by patcrad
I think OP is indicating by all the serial numbers matching, the slide is a G19 slide, then the receiver would have to be a different serial number if it was originally a G17 cut down to accept a G19 slide.
All evidence suggests this (photo) is a legit gen 1 Glock 19. Now, the OP has to prove he did not just snap a pic of it, or find one on the internet and claim it is in his possession. So yes, some more photos would indicate the OP is legit.
the numbers match, then yes, it is a real Gen 1 G19, and the first pic of one I have ever seen.