I have an antique washbowl and pitcher set that has "Dresden Semi-Porcelain" on the bottom of each piece. The set consists of a large bowl and pitcher, a chamber pot with lid, a small pitcher and a soap dish with lid and an insert. The set is light blue with a white background with gold trim. The small pitcher has "3000" handwritten in gold on the bottom. I would like to know if anyone knows the history of such a set and maybe an approximate worth. Thanks for any input you can give to me.