Wista 45DX back type

Does Wista 45DX have standard revolving Graflock back ? I know 45DXIII model does have, but what about 45DX ? 45DX specifications on B&H doesn't mention that, whilst they do mention this fact for 45DXIII, other sources mention Graflock availability on 45DX as well.
So, where the truth lies ?

All of the wooden Wistas have reversing backs (you take off the back, turn it 90 degrees, and put it back on), not revolving backs (change the orientation of the back while it's on the camera).

I believe that only the DXIII models have a Graflok back. The others are spring back only. Wista makes slide-in roll holders that work with both the Graflok and the spring back models.

Thanks, understood.