After looking at the 1928 version of "How To Run a Lathe", it appears that the conversion to the new style started in 1925.
I tried to figure out the search without any success.
So, is this lathe now actually a type "N"?
I hope I am not reinventing the wheel.
My reverse bracket is held on by two machine screws and a small block at the bottom of the bracket. The stud measurements on mine is 1.5" OAL, first step is .5",the second step is .375" and .3125" thread.So this is apparently an interim design(?) that was used for a short time.
The junior looks the same but the first step is .625", so not the same.
I always seem to be the oddball.....