This small German built switch is used in many applications throughout Catalina's production. It was used on everything from the small Capris and Catalina 22 through the Catalina 42 beginning in about 1988. It is sometimes used for the blower switch on the engine panel of an boat equipped with an inboard engine.
It is designed to fit a rectangular hole 1/2" x 3/4". Overall dimensions are .6" x .83". It has two spade connectors on the back. A red indicator is exposed when the switch is on. One side of the switch has the number 1801 molded into the upper right-hand corner