Below is DeVlieg's complete American edition of their all-models catalog printed  in the mid 1950s. It contains a wealth of interesting detail that concerns not only  the technical specification the various models, but also how they - and their various accessories - functioned. The catalog is over two pages - the second is here
An article on the DeVlieg Jigmil can be found here: http://www.lathes.co.uk/devlieg