Nice,
The overarm looks really sturdy compare to the round bar on mine, which is a different model.
The horizontal spindle is probably an INT 30 , NMTB30.
The vertical mill attachment spindle a MT2. The mill weight about 800lbs . Sturdy little mill. I just wish my vertical spindle would be adjustable to move in and out in "Y" .
The Tom Senior rotary table and index kit is a bonus. I have never seen one in person and I have seen a couple of Tom Senior mills set-ups.
Overall I am happy with mine, but like everything, I sometimes wish it was bigger.