Madame Alexander, Snow White, Need Info.

Hello,

We just retrieved a Madame Alexander Snow White doll from the storage.
It is approx. 12" tall with yellow skirt, red top, purple cape, VERY
black hair, leather shoes (w/bows), and of course, the slip. She is
stamped with number "13" on her back and dates back to late 1920's and
early 1930's, at least we think so. She is articulated (movable arms,
legs, neck) and made entirely out of porcelain.

I would appreciate if anyone could give me any idea if the doll is
considered a collectible and if it could be categorized as antique.
And, is it worth anything?

Thanks in advance

With regards

CMC