Doyen - Drinking set - Lido - cut crystal - 9 small glasses

Lot of 9 small liqueur glasses in cut crystal by Doyen, model “Lido”, dating from the 1920s–1930s, Art Deco period.
Notable feature: the presence of manganese in the crystal, which gives it a green fluorescence in the dark under 365 nm UV light.
The glasses are in very good condition, with no chips or cracks.