I have called this a hybrid clock because it is just an ordinaary clock that Liberty & Co. have taken and mounted into a pewter surround.
The pewter is a design of Archibald Knox from the top of candlestick model 08 (please see the pewter section of this website).
So this is another example of Liberty & Co taking a Knox design and applying it to something else.
The description below and the image is shown courtesy of Kinghams auctioneers.
Archibald Knox for Liberty and Co., an Arts and Crafts pewter Tudric bedside clock, model 01495, 8.5cm diameter.