@shoot summ a real beautiful DP 900 you have there. Because of the badge, a pre 1939. To have the slow speed pulley and ships wheel on one drill press, with a fairly clean table no less, is not common.
Larger drill presses from the 1940s and beyond, usually 17-in and greater had a built-in table lift. Drill presses in the 14/15-in range typically did not have a table lift and it was an accessory. This was the case with Atlas, Walker-Turner, Delta, Craftsman, etc.
Here is the DP 900 drill press table lift (incorrectly mounted upside down):
Here it is in the 1941 WT catalog; note it has wheel crank in the illustration, it would stay this way up until the sale to Kearney-Trecker despite it being a ball crank:
I would add a Walker Turner table lift is pretty difficult to find. I have had one and it's lift capability was not adequate or smooth. I did not care for the way it was designed, too spindly and thin, therefore I sold it.
This is my 1958 Craftsman drill press with the Atlas made head and table lift which works very well:
Ironic that the drill presses of a by gone era were made so much better but lacked basic accessories such as a table lift or light. These had to be purchased separately.