1960's bubble inclusions of Murano glass vase

Beautiful vase Murano glass to inclusion of trails of bubbles. Blue tint very elegant and decorative. Included bubbles trails give a very nice effect by transparency. I date years 1960's to deal with this particular technique I've found almost in the same way on a glass of 1960 at Doria lights Germany chandelier shades glass from Murano. No visible traces of use on the vase except on the basis that has small claws. No shots or damage. The glass is very thick which gives the vessel a weight of 2,520 kg to a height of 21 cm and a diameter of 14 cm max. Design probably unique like all handicrafts Murano at this time, I have not found similar.