Very unique square profile with a recessed base allowing a lower profile within the mount.
Brown Bakelite Lid & Brown Ceramic Recessed Base
SPST Single Pole, Single Throw
Two terminals either connected together or disconnected from each other.
BRITMAC LITTLE BRITON
220-250 Volts ~ 5Amp
Recessed Base: 45.5mm Diameter x 9mm height
Above Recessed Base: 51mm Base x 36mm Height
Although electrically compliant these are not direct fit replacements for modern switches, some modification to the mounting pattress is required