I do wonder if this was made by Salvador, we'll await Kevin's expert eye, he has more experience than most in this area.
Nick
I have seen a coupkle of other weights with very similar spotted dogs. One of those, illustrated in Bob Hall's 2001 book
World Papperweights: Millefiori & Lampwork, has three dogs around a lamppost with one "doing what dogs do". The other, sadly, I cannot recall the detail for right now - it got lost somewhere in one my "unfinished work" folders.
As for the hunter on a horse, I have never seen another but Salvador Ysart is usually credited with these sort of "one-offs" - which can then later pop up in other weights.
The one in Bob's book was said to be by Paul Ysart but I have always doubted that. The one shown here seems to be consisitent with work from the Ysart Brothers period of Vasart. It might even be a pre-war wight but I think the base finish would have been better if it was.
Could it be early Vasart Ltd (1956 - 1964)? Might be possible - would need the usual
shortwave uv check, or specific gravity measurement, to see if it has a lead-based dome.