The cup is unmarked for obvious reasons these are never marked! Since it would kill the lithophane look.
If you like my goodies have a look at my other auctions for a lot more top maker pieces like Vienna , Sevres and so on. Photos are part of the description - if you need others just let me know exactly what you are looking for and I'll take care of it speedily! Please do not send me questions on items other than my own! The item "Antique 19thC KPM Berlin Porcelain Lithophane Cup & Saucer Plate Porzellan Tasse" is in sale since Thursday, March 7, 2019.This item is in the category "Pottery & Glass\Pottery & China\China & Dinnerware\KPM". The seller is "kpmisbetter" and is located in Sparta, New Jersey. This item can be shipped worldwide.