Switch, slide. SPDT On-None-On.
Alco Electric TSS11DGR
Switch, slide. SPDT, 2 position. Operation: On-None-On. Contact rating: 0.4 VA max @ 20VDC or peak AC. Actuator, extended, side. Actuator color: black. Mount: PCB vertical, 3 pin. Alt P/N: 1571984-1.