Antique liquor glass Basque D

We believe this to be a glass made by Portieux.

This liquor glass, with its charming hand-blown shape, features a Basque pattern.
It would be lovely to combine it with other Basque pattern items from antique tableware collections.

Condition: No noticeable scratches. Due to being hand-blown, there is some slight distortion.
Size: Diameter 4.5 cm x Height 7 cm, Capacity when full: 80 mL
Era: We believe it dates from the early to mid-20th century.