Royles Ltd.
1876 - 1975
1876-c.1975, engineering company, Manchester
William Beardmore and Company Limited
1887 - 1975
1887-1975, engineering; shipbuilding; aero engine manufacturer; road vehicles, Parkhead, Glasgow, Scotland, British
Siemens-Schuckert
1903 - 1966
1903-1966, power engineering and pneumatic instrumentation, Germany
Platt Brothers and Company Limited
1821 - 1982
1868-1982, ironfounders, textile machinery manufacturers and colliery proprietors
Curnon Engineering Company
Manufacturer until at least 1974, Claude Road, Manchester, M21 2BZ (see receipt from accession enevelope).