1899 Trained Craftsman, Edmund Oswald Mueller, starts a small wooden toy business with his wife Lina at Schindelberg 8, in Seiffen. This was the establishing foundation of the family business that continues to this day. Edmund used tools borrowed from his father-in-law, Oswald Langer, who owned the Roscher-90 mill.

The first products consisted of miniatures including; miniature chambers inside match boxes, cars, aircraft and jewelry made out of wood.

1914 Real estate is purchased at Haupstrasse 132. A house with attached workshop is built after the meadow and land are drained and cleared of water and rock. This also allows horse carts to come and go to the house.  1918 A large shed is built in which to store wood.  1919 Finishing the extension of the living house. A so called "Fuchsschwanz" is used to cut wooden trunks in quarters without loss.

1926 The Muellers attend the Leipzig fair for the first time offering a catalogue showing their entire product line.

1929 The world is slipping into a deep economic crisis making products more difficult to sell. It becomes more necessary than ever to go abroad looking for new business so that the company can survive. 1936 The name of the company "ERZ-GEBIRGISCE KLEINKUNST" is registered at the Deutschen Patent-und Markenamt.