Mystery Doll: The Gotz Bitty Baby

  Ok, somebody help me. I know American Girls were originally made from a Goetz head scuplt. But what about Bitty Baby? Take a look at this kid:

I found this baby at Salvation Army the other day.

I'm scratching my head, and not only because I'm still healing from having that lump removed...Who is this kid?!

I thought at first she must be a rerooted Bitty Baby.

Lots of curly hair.

Real Bitty Baby.

.

But she says Gotz on the back of her neck.

And there is no paint or molded hair on her head under that hair.
She has a white cotton body.

And long, flat neck strings.

Her hands and feet look like Bitty Baby's too.

So is this a pre-Bitty Baby Gotz doll with the same head mold? What's the connection? Can anybody help me with identifying this doll? I'd appreciate any information.