A: The mark you provided was used by Nelson McCoy Pottery Company. They made stoneware and pottery in Roseville and Zanesville, Ohio, from 1848 to 1990.
Your vase is circa 1940 and similar vases sell in the range of $25 to $50.
Q: I have a coffee set that I inherited from my grandfather in Germany. There are six cups, six saucers, a coffee pot, a creamer and a sugar bowl. Each dish is decorated with a gold pattern over a dark blue glaze. The inside of the cups are all gold. “Echt Kobalt” is marked on the bottom of each piece.
I hope you can tell me what the value of my set is.
A: “Echt Kobalt” means real cobalt and it refers to the dark blue glaze that decorated your china. There were several Bavarian porcelain factories that included these words with their marks. Your set was made in the mid-20th century and would probably be worth $250 to $350.
Address questions to Anne McCollam, P.O. Box 247, Notre Dame, IN 46556. Items of a general interest will be answered in this column. Because of the volume of inquiries, she cannot answer individual letters.