It looks like you bought a genuine EMT 927D.
I collected almost 1000 pictures from R35, R36, R37, 927 D, A, St, ect.
and i can tell you a 927D exists in many variations.
The 927D is not better than a normal 927 and was even cheaper than a 927ASt
(proof from a original pricelist from the '50)
It used the same motor and bearing/platter like any 927. (which was always top notch)
The only difference was that the record industry didn't need the break ect. so many things were left out of these machines, and other things were build in like extented readout for the rilleranzeiger, but almost every 927D had an spindle (with spring) like yours to center the record.
I can proof (with photo's) that when an order come from a company, EMT took a 927 chassis from the shelf and made a "D" machine from a 927st or 927ASt chassis.
This varity also apply's for the 927F machines: some have a Rilleranzeiger, sometimes a light for styles, some had a powersupply....ect
All these variations also exist for the inscription on the machines:
not every "A","D" and "F" machine have the right insciption on the top.