It dates from around 1680 - 1700 by the look of it, but - like I say - I'm still learning. I don't think it has ever been cleaned in it's long life and it shows signs of the original silver-plating on the foot.
In the days before electricity was tamed, to plate an object like this in silver meant that - if you did nothing else for a living - you would be either dead, mad or both by the time you were about 40. Silver was suspended in mercury which you applied to the de-greased metal, then burnt off to leave a deposit of the less volatile metal behind. The mercury would produce clouds of toxic steam in the small workshops, and it would be breathed in by all around.
Georgian and Victorian hatters used mercury when 'knapping' the felt on tall hats, hence the term used in this title.
I won't be re-silvering it, but I might give it a going over with acetone to get rid of all the old wax and dirt. Can't wait for Christmas.