This is a Genuine Meyer solenoid the part # is 15925. This it Factory Meyer, not the aftermarket SAM part that most other sellers have. These are the new style with the Deutch connector. This is Coil #15916 and Cartridge valve #15917. Came on E-58H, E-61H, E-68 Xpress, E-88 Xpress, E-78 and V-68.
This is the A solenoid on the E-58H, E-61H, E-78, E-68 and E88, the B solenoid on the E-68, and E-88 and they call it "S1" on the V68.
Another # sometimes found on the valve is 3038675.
Below are the instructions for the pumps these valves fit: