I doubt this is a jeweler's anvil in the extreme. Thousands of little anvils have been made over a long period of time as curios and paper weights. One I purchased is a brass curio from Gretna Green, another is nickel plated Britannia metal, labled "Industry," and a third is unmarked, cast in brass. I have several, and a blacksmith friend of mine is an avid collector of these.
The one in the photo has no means for attaching it to a bench; it appears to be simply a small miniature of a London pattern anvil, which would have been bound to a stump with iron straps. Another clue, it seems to me is that it is brass, and that it has been plated. The actual jeweler's anvil that I have is made of steel. It's hard to imagine a brass anvil made for use, little say one that has been nickel plated. How long would the plating last on the working surfaces?
But it is a beautiful little anvil, very perfect in its dimensions. Just not suitable for use IMO.