In 1924, it certainly took a lot of daring and optimism to set up his own business, as the consequences of inflation had hardly been overcome. Despite all this, Karl Thielmann took the decision to become self-employed and set about realizing his plans with tenacious energy. On April 1, he opened his own business in the "Stoll workshop" in Haiger- Sechshelden in the Dill district. Initially, locksmith and forging work is carried out for the agricultural sector, and a threshing machine is used to thresh grain on a contract basis. Karl Thielmann's first employee was Emil Haas, who remained loyal to the company for over five decades.