This is a superb wine crystal glass.
Dark green color
Similar work in the Baccarat's catalog for 1916.
"Champigny" or " Richelieu"
A bit different on the leg:
Not signed, because made before 1936.
Superb !
Dimensions:
Hight: 11,4 cm
Diameter: 6 cm
Period: 1880 - 1900
AUTHENTIC !
Here is a converter inches / cm to help you with the dimensions: