Is this bowl Blenko 'Amberina', 1950s? It measures about 14 cm across at its widest and stands about 7 cm high. The pontil mark has been ground out concave. The glass is quite thin, about 2 mm, around the ruffled rim, but the base is about 5-6 mm thick. The bowl has decent weight overall given its size.
Thanks for feedback.
Anton