ERG! I meant it was a 1936 15-91, my 1948 15-90 is the one I still have.
I love those Tiffany decals! I've only ever seen them in photos. There's one in a town about 40 miles from us that DH took a pic of, and I keep meaning to go look at it in person.
That's interesting. I didn't think the sewalot site was often wrong (other than his grammar and punctuation), but that's confirmation now that I'm not crazy (well, not in this anyway) and there was reverse on a 15 prior to the 50s.