A: Dux Porcelain Manufactory made your vase. They were in Dux, Bohemia, which is now Duchcov in the Czech Republic. This mark was used from 1900 to 1918. The firm was founded by E. Eichler in 1860, and it is still in operation. “Eichel” means acorn in German, which explains the use of an acorn in the mark.
Your circa 1900 vase would probably be worth $1,000 to $1,200.
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