You have a Simon Halbig doll that was used by the German firm of Kammer & Reinhardt. Currently, the highest auction prices for a 6" Simon Halbig/Kammer Reinhardt doll is $500 - $700 on today's market. The values in the antique doll market have unfortunately dropped precipitously in recent years. You can confirm my findings by contacting Theriault's Auctions for free through their website. They specialize in antique dolls. Here is the link to their website for you:
Just checking in to see if you viewed your answer and if you are seeking further assistance?
Please let me know.