Circa 1930s Schaublin Type SV65 miniature precision toolmaker's lathe. Another example of a late-Type 65 can be seen here

The superbly engineered clutch-countershaft unit. Unseen, inside the unit, is a spring that, in combination with outer spring ,allows it to act automatically. When the operator  moved the disengage handle it released the central cone clutch and applied a conical brake. Several pulleys were fitted, all designed to power accessories: drive came from the right-hand side, via a non-stand specification V-belt; just inboard of the first bearing housing was a small pulley for 7 mm round belt; to the left of the clutch a single, large-diameter pulley for 5 mm round, then two same-diameter pulleys side by side, for  7 mm belt, then an 3 step V, also for 7 mm round and, finally, on the left-hand end, a wide flat-belt pulley.