As noted many years ago here although these are so very  obviously tourist souvenirs of various ages they nevertheless manage to get sold to new collectors as genuine antiquities  quite often.

Although the tops are much the same there appear to be only a few bottom  types.

And another type.

Some different types have turned up.

And a very hopeful seller on eBay - who I think does believe it is ancient.

And yet another type.

It  appears that these were made some time before the First World War.

Some people believe thay were made as paperweights - but obviously also sold to gullible travellers as genuine.