Amazing, or perhaps astonishingly, or maybe revoltingly, the seller has no clue what it is. I just did an eBay search for any and all of these words in a variety of combinations: st. clair, kewpie, paperweight, doll. Nothing. Not in an any category search or a specific paprweight search.
Sadly, kewpie did not bring up anything, nor did st. clair kewpie. So I guess the seller missed the boat.