Little is know of the origins of this Russian-built development of the  SL1000 copy but it was obviously a comprehensively strengthened and revised design with the main differences being an increase in centre height from 1.42 to 2 inches and the fitting of power feed to the carriage through changewheels (the gears being of clock-like proportions) and an enclosed, lever-operated dog clutch mounted to the left of the headstock plinth. Oddly--and in contrast to the rest of the lathe - the cast-aluminium bracket used to support the heavy-looking  motor assembly was of rather delicate construction. Any reader with one of these lathes, or literature about them, is invited to contact the writer. Another Unimat copy is shown here. And a home-built version here.