Mike, and All,
The Ramshead piano foot is a good one, especially in that colour.
I have a similar piano foot, flint glass, featuring the devil's head three times. I always thought, though this is unverified by the PV catalogues, that it was made by PV. My reasoning here is that I have compared the structure of the base and it is formed in an identical way to the ramshead one. From memory the base is the same dimension, although the cup measurements are very slightly different.
This should not be confused with John Derbyshire's famous bulls head piano foot, which although of similar form has a different undercarriage.
Any further information would be appreciated.
David