I think you have a very beautiful piece. I really, really like it's novelty...and who wouldn't want the extra luck these days?!?!? It appears to be a sugar holder to me. Luck o'the Irish with tea!
I agree that a top producer would have proudly displayed their hallmarks! (Really need markings like the others stated!) which was required in other countries. In this country, early on, it was not essential that pewter be marked by the maker, which opens the chance that it was made here by an Irish descendant or was a custom made piece.
The best way to identify genuinely old pewter is by its surface. Since Pewter is soft, the surface should appear slightly uneven.The piece may look smooth but will feel rough when it is touched due to scratching from daily use. If it isn't real soft, then it may be Brittania (the revised verision of Pewter popular after 1825 developed because pewter can be bent, dented, and scratched easily. It also corrodes and develops tiny pockmarks. It melts if it is placed directly over heat). Britannia resembles pewter so closely that one can be mistaken for the other. It also is an alloy of tin. Britannia was brighter in appearance (still not as gleaming as silver) and more durable. Most Brittania had a B imprinted into the piece.