of James Street West, Bath. Note: This is the same street as the registered office of Horstman Cars; the telegraph address of this company was Horstmancars, Bath.
Note: the name was spelt as Horstman, presumably to distinguish from the other Horstmann businesses.
1954 Simms Motor Units acquired a controlling interest in Horstman Ltd of Bath. Horstmans made electric clippers, ground thread hobs for high precision gear cutting, as well as camshafts and similar products for most of the leading motor manufacturers[1] [2].
1957 Hair Clippers for Agricultural and Hairdressing purposes and for the use of Manufacturers, including Hatters, Shirtmakers, Hosiers, etc.
1961 Part of Simms Group: precision engineers, gears, control mechanisms, camshafts, hobs, etc[3]
By 1969 Lucas had taken over Simms; Horstman's stress analysis service was used in the design of the engines for Concorde[4]
1972 Received order to build gearboxes for Chieftain tanks[5]
1975 Horstman Camshafts was sold to Weyburn Engineering[6]
Presumably this left a remaining entity which was called Horstman Defence Systems
1980 Horstman Defence Systems was sold to Electrical and Industrial Securities