Original reclaimed 1920's, polished yellow brass electric door bell press.
Has recessed ceramic press button, this is within a plain flat outer border that contains the three drilled fixing holes.
There are two connection terminals to the rear extension, one to the side, and one to the end (see pictures below). It is suitable for use with any low voltage electric bell system, and has been tested to be in full working order.
It will require a 1.1/2" diameter hole to a depth of 2" to fit.
Face plate diameter 4".