Greg has got to be pulling his hair out...
Here's my last word on "kewpie dolls" (at least in this thread).... I think the ones you would want are the ones that came with the pins. There were definitely dolls and pins put together later. My "best' dolls have a crude SF on the cap, "Giants" stenciled on the chest and are of the proper black and orange color scheme. I think the "right" ones (as shown in this picture from a 1964 merchandise mailer) have a doubled up ribbon, held in place by the pinback's pin, which is looped through an elastic band around the doll's neck.
P.S. sure wish I had a dozen of those "correct signature" Mays nodders, at a buck and a half apiece.