Its a Multi-Sync CRT Monitor - the Gateway EV700.
The adapter is a no-name brand with a dial on it with letters A - P and Dip Switches 1 - 9 though maybe 5 of those switches work; like V-Sync, H-Sync, Composite (Pins 7 - 9) and couple of others (1, 4 & 5). On the dial selections G, J, L, and M work on both machines, with those mentioned dip switches set to on.
The adapter is a no-name brand with a dial on it with letters A - P and Dip Switches 1 - 9 though maybe 5 of those switches work; like V-Sync, H-Sync, Composite (Pins 7 - 9) and couple of others (1, 4 & 5). On the dial selections G, J, L, and M work on both machines, with those mentioned dip switches set to on.