Fantastic 170 or so year old cased cobalt then cut to clear perfume bottle with hand polished and cut facets. I believe this is Boston Sandwich, but could be Bohemian? Extremely fine quality work. Nice and solid. The pontil is polished and there is a clear applied glass neck ring if you look closely. Looks to be in excellent condition without chip, crack etc. About 6 1/8" tall and 3 3/8" diameter at widest.
Antique c1860 Boston Sandwich Cased Cobalt Cut to Clear Glass Perfume Bottle