There is no year of production on the label which leads me to believe it's a 'Replica'.
Isn't it an Alpha copy of the very first MA-1s?
I sure looks like it except for the tag. When I first saw the photos, I was sure it was a repro of a B-15D (Mod).
There are two "schools of thought" about the first edition MA-1. One is that the USAF continued to specify the jacket formerly called the B-15D (Mod) but simply changed its name to MA-1. The other school is that the first MA-1 was enough different from the B-15D (Mod) that it was a new jacket. Either way, the first MA-1 had its own nomenclature tag. It wasn't a modified B-15D (Mod). And there was never a MA-1 (Mod)...or at least I've never seen one.
So...I guess what I'm saying is the jacket in this thread looks like a very nice repro of either a B-15D (mod), or a first edition MA-1...with the exception of its tag.
AF