Courtesy of Dottor Jazz, a picture of a possibly unique appearance of Rudy Van Gelder initials on an Atlantic release, Atlantic 1235 Phineas Newborn Here is Phineas (1956)
For comparison, a similar period van Gelder etching from Blue Note. The hand is very similar in formation,The “R” follows the same direction of stroke. In both cases the “V” is smaller than the letters either side, whilst the “G” has a separately drawn serif. Taken as a whole there is a very high probability it is drawn by the same hand.
How interesting, van Gelder credited on the liner notes as engineer (only my Japanese Victor press, sadly)