Does anybody know anything about this mark?

by Lori Kosierowski
(Pennsylvania)

My dad was given this doll and is stumped as to if it is worth anything. Here is a picture of the Doll Makers Mark on the back of the head.

I can send many more pictures if someone can provide me with an email address.

I have looked through many books and cannot find any info. I know that you all are experts and may be able to give me some information.

Thank you for your help in advance. It is greatly appreciated!