Q I’d like to know the history and value of this Royal Bonn vase. It’s marked with a crown over a shield with initials and the date ”1775.” What do the initials and date represent?

A Royal Bonn is a trade name used by Steingutfabrik Franz Anton Mehlem (Franz Anton Mehlem Earthenware Factory). The company was in business in Bonn, Germany, from 1836 to 1920. The letters ”FAM” in the mark are Mehlem’s initials. The date, ”1755,” is the date the earliest predecessor started a factory on that site. This mark was used by Franz Anton Mehlem’s factory from about 1890 to 1920.

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