Ok, I emailed the seller about this machine but haven't received a return email yet.
I also emailed about another machine listed that is near Meridian. Just got pics tonight. It is a Singer 15 and Serial No. indicates it was birthed on March 9, 1949! Seller asking $75 and it's in a good looking cabinet from what I can tell. Is there a way to tell if it is a 15-91 or another type of 15. Looks very much like my special Freebie 15-91 I just got but I didn't get a case or cabinet with mine. She also says she has a "older" Singer "iron base" machine in her storage unit. Hmmm, a treadle maybe?? She's sending pics tomorrow.