 Celeritas automobiles were then assembled using French engines at the Gräf workshops, and in 1904 the gentlemen founded a joint company, named "Gräf & Stift".Later, the company manufactured automobiles for the "Spitz" brand, owned by the automobile vendor Arnold Spitz.When Spitz went bankrupt in 1907, Gräf & Stift started building automobiles under their own brand.