Ulmer or Wilmer?

Q: I have looked high and low for this mark and can’t identify it. It says “Wilmer Keramik” on it. Can you tell me anything about this?

A: Your dish was made by Ulmer Keramik. Ulmer vases, plates, and other decorative pieces are often offered for sale on the Internet, but there is very little information about the company. The words “Made in Germany” indicate that the piece was probably made after 1915. We have seen Ulmer Keramik pieces marked “Made in W Germany,” indicating they were made between 1949 and 1990. Your dish was probably made before World War II.

Ulmer Keramik