There are lots of books out there that could help you identify your doll including"
"200 Years of Dolls Identification and Price Guide" by Dawn Herlocher
"16th Blue Book Dolls and Values" by Jan Foulke
"The Doll Catalog" A Photographic Guide to the Doll World" by Donna H. Felger
There are many more. You can also try the Doll Reference Guide online. The United Federation of Doll Clubs (you can find them online as well) is a font of information about dolls.
It is possible that the number 1999 refers to the year it was made but I know next to nothing about dolls.
Remember when you look at books, stated values will not reflect current values. Once you identify your doll, then you can begin an online search for values in online shops and auctions.