1960s set of 2 lowball whiskey glasses, Bubble Base Old Fashioned

A set of 2 hand made whisky lowball glasses or old fashioned glasses, with a control bubble in the heavy splayed base (the bubble opening is open) and a flaring rim around the waist. Perfect for grip! The glass at the top is slightly flared for a smooth drinking experience. These date ca 1960-1980s, I have not been to determine the maker with any certainty. The glasses are quite heavy due to the solid glass bottom and they´d do very well as ship´s glasses. There is no way these are getting knocked over! Weight: ca 550 - 600 grams per glass (empty) Condition: great! Size: ca 3-7/8 inches tall (10 cm) You will receive both glasses