Manufactured by Dignus Engineering of Orleans Road, Twickenham, Middlesex the 3-inch centre height by 9 or 19-inches between centres screwcutting and gap-bed Dignus made a brief appearance in the early 1920s. In 1922 the company took a full-page advertisement in the 1922 Model Engineer Exhibition catalogue to list their Type A and Type B machines - both with a 3-inch centre height and 9 inches and 19 inches between centres respectively. Two other versions were also available, the A.G. and B.G. fitted with backgear in the form of epicyclic reduction gears within the larger of the headstock cone pulleys.
Rather meanly the headstock had only two speeds and just a single swivelling slide rest was fitted, mounted on a bar fitted into a socket on the front of the saddle and locked by a bolt at the front. The carriage was driven by a leadscrew that ran down the centre of the flat-topped, 90-degree edged bed - but what arrangements were made for a dog-clutch is not known.