The following pictures show a dismantled "Senior".The lathe has, in certain of its details fittings, a very ML7 look about it - although the headstock was of an older design school with simple split plain bearings.
Headstock - in this case with the spindle-mounted bull wheel missing.
Headstock, less the tumble-reverse assembly
Underneath the saddle
Changewheel, countershaft and headstock guards.
Underneath the very ML7-like top slide
Countershaft bracket, inner changewheel guard and hinge point for out cover, tumble-reverse lever, dial-thread indicator and changewheel guard.
Looking almost identical to the Myford unit the tailstock had a proper compression lock for the barrel and a decently-long bed-clamp handle.