Motor-Driven Mica Under-cutter.
This unit mounted in place of the cross slide and was used to cut back the mica insulation when a dynamo or starter armature had been cleaned up in the lathe.

Swivelling Vertical Milling Slide M6-500/500A with built-in vice - this unit plugged into the fitting normally occupied by the top slide and was a smaller version of that available for the 10" lathe.
Overall Height 111/2"
Vertical Feed 13/4"
Vise Capacity 2"
Jaw Depth 3/4"
Jaw Width 2"
Another picture here.

Bed-mounted micrometer stop

Bed extension 

Atlas 6" lathe specially configured for armature reconditioning. A variety of specifications was available, all based on the use of a special set of Jacobs chucks, one of which contained a bearing to support to tail end of the armature, and the electrically-driven mica under-cutter head.