The house I've just moved into is fitted with the light switches shown in the pics. They are fitted to each bedroom and the landing. The landing light is also switched from a second standard switch on the landing as well as a standard switch in the hall. So essentially 3 way switching. I can't find any info on the internet and wondered if anyone has any knowledge of them. At least one of them flickers in certain positions and I'm probably going to replace with standard switches. Although difficult to see, the second picture says they are fused and the replacement fuse is listed as Crabtree list no 6925. So I wonder whether they are Crabtree switches. Anyway, I would be grateful for any information. Thanks, Terry