Parker Altec Hydraulic Control Valve/Manifold 1-Spool 352-00255 592861 VDP11C117
The number 592861 is stamped on the body while the other two part numbers are stamped on the ID plate. I have little information on this model but found a reference to a similar model on the Internet that said it was one-spool rated at 20 GPM at 2000 PSI.