Porcelain Dolls

Hi i have some porcelain dolls that i dont know much about because my grandma got me them for my birthday every year since i was small, some are still in boxes and only opened once as well as some have tags too. i cant find anything about them on google or ebay and i would like an appraisle on them if you can i have had them for years now, some are limited addition as well and i think some might play music im not sure but i can check. some have stange numbers and letters i dont know what they mean, maybe a cerial number but my grandma collected them and then gave them to me. I have ten dolls i would like to know about.