It looks as it has never been fitted. I have a set of these which i will be listing others shortly.
The item "RECLAIMED SERVANTS MAID BUTLER BELL BRASS BELLS DOOR KNOBS HANDLES" is in sale since Tuesday, August 7, 2018. This item is in the category "Antiques\Architectural Antiques\Door Bells & Knockers". The seller is "period-home-fittings" and is located in wells-next-the-sea, Norfolk. This item can be shipped worldwide.