This small cup and saucer, I have found, after many hours of research, was made by the Porzellanfabrik Koenigzelt. Although this company produced porcelain under this name between 1886 and 1951 and used several marks this particular mark was used between 1886 and 1914. This set is in great shape for it's apparent age with only a wisp of a crack that can be seen but not felt. I have captured it in one of the photos and considered it in the price. The saucer is 4 7/8" in diameter, the cup 2 1/4" tall and 2 3/8".