The unit could be indexed manually - by pulling out the knurled pin - or automatically by a simple lever arrangement as the tailstock spindle was drawn backward
Schaublin 70 with one version of the maker's screwcutting and power-feed attachment in place
Changewheel mounting bracket--though this is actually from a 102
The complete changewheel set
An unusual double slide: the front fitted with screw feed and rear lever operated.
Usually, with this type of assembly, it's possible to set either side as screw or lever feed