Rotary switch with durable spring-loaded mechanism and solid screw contacts. The central insert and handle are made of Duroplast, the base body is made of steatite, a proven ceramic material.
Here in the version as a series switch. With a series switch, two lights can be switched on and off separately and together. There are four switch positions: Off, A on, A and B on, B on. These are each switched by a quarter turn.