Anyone have info on this Parker desk set? I'd equate it to an Esterbrook Dipless. The base gets filled with ink, the pen picks that up when placed in the base. The section has two reliefs (not three like VP or 75), one for your thumb, one for your top finger. The nib can be rotated similar to a VP or 75 nib. The section has degree marks, labeled 0 to 7.