I recently bought a pair of cathay porcelain black baby dolls, and would like some help in finding out more about them. One is marked 23/5000. The other is marked 79/5000. Is there a name for them to help me learn more about them?

That means 5000 of them were made. Post a picture, maybe someone knows the name.

You could check here and find the ones you have...
African American Dolls: Cathay Wholesale