Wm. K. Walthers, Inc. has sold its Darda line of toys to Simm Marketing GMBH, a long time licensee of the Darda brand in Europe. Darda has been a Walthers brand since 2005. Simm Marketing GMBH was founded in 1926, when founder Richard Simm began making costume jewelry. In 1965, the company started producing toys and today Simm distributes other toy lines in Germany and surrounding countries. Simm has been offering Darda products in Europe since 1999.