Vintage Clare-Pendar Series S820 10E9 11° angle tall reed switch keyboard switch, NOS 

 Clare-Pendar Series S820 is a tall reed switch keyboard switch series from Clare-Pendar. The European counterpart is Clare/Pendar high profile reed, but the North American and European series have different designs. These switches have been found with Clare-Pendar branding. The top of the switch has two screw holes to allow it to be secured into a mounting plate; retention clips are not used. Recesses in the body of the switch appear to leave room for the screw shafts. Used in Control Data Corporation CC609D terminal