A tidbit from a Google website:
"Haid and Neu was established in 1860 in Karlsruhe but by 1868 only 2000 machines had been made. This had increased ten fold by 1872 and 1881 saw the firms 100,000th machine. By 1898 half a million machines had been made. The million was reached in 1904 and two million machines had been made by 1921. The Company survived the Second World War but in 1958 was taken over by Singer."