nope, are non latching, Normally open momentary tactile switches, kind of the ones of a '80s keyboard such as an AtariST or similar.
What puzzles me is: if switches are supposed to be already connected two pins by two pins, this could be the same as using a 2 pin switch and jumpering the other two on the board? But my head hurts when I look at the schem below .
Is that the schematic for the SEQ or something else? The SEQ is connected in a matrix. From the layout data it appears Wilba used the common halves of the switches to act as PCB jumpers.
Latigid on is right, some connections were optimized for the matrix routing, but don’t worry too much
If your switches are “temporary on”, you can use them, if they fit.
There are 2 input pins and 2 output pins for every switch on the PCB.
The input pins and output pins are usually connected internally within the standard switches, but you could do that with a piece of wire on the PCB, too (just as you said - jumper on the PCB, but don’t connect the two open pins. Connect them to your your two switch pins, respectively)!
