Twin V-belt drive to the headstock spindle and a generously-sized backgear bull wheel.
Screwcutting gearbox model - tumble reverse assembly and gear drive. The awkwardly sited backgear "engagement" pin can be seen on the face of the bullwheel at the top of the picture. Turning the spindle and getting the pin home could be a frustrating business
Unlike earlier Models the 5-inch was given spindle-speed indication marks at the end of the speed selector arm.