movements are free and move easily. Screws and clamps look as new. These were popular in the 70's and 

used to turn two diameters simultaneously. The lead tool could be the provided NIB insert holder or a 5/8" square

tool bit. Set the lead tool to face  and turn the larger diameter, then set the trailing tool length using the Vernier 

scale and the diameter with the graduated dial screw having direct readings in .0005. For the right job on the 

right lathe these repeat well and save time and increasing profit. Photos are from catalog 75, dated 1976.