Have you visited the Pottery and Porcelain Marks Gallery on the site yet? Lots of people have, and I appreciate their favorable feedback. There are some names you might know like Metlox pottery, for example, and others you not so familiar including Sitzendorf porcelain. Sitzendorf manufactured porcelain figurines with a particular mark for more than 70 years. Take look at the mark so you'll recognize it the next time you're estate saling, and be sure to bookmark the gallery for future reference!