The original manufacturer is unknown, but these Empoli style stoppers look very similar to the work of "Diana", or Blenko. I am doubtful they were made by Blenko. Clear Orange colored glass bottle stopper.
Vintage Mid-Century MCM Murano Bulicante Bowl Red Orange Handblown Glass BOWL
Vintage Cobalt and Clear Stopper Handblown Scent Potion Decanter
Set Of 2 Vintage Clear Art Glass Birds Laying Figurine Handblown Paperweight
Vintage Red & Clear Glass Handblown Glass Ashtray Flaw
clear & orange glass vintage miniature cat animal figurine
Vintage Viking Orange Glass Basket w/ Clear Glass Handle
