This is a lovely old glass decanter.
This is the famous pattern "George Sand" we can find it in the 1899's catalog from the "Verreries & cristalleries Legras et Cie à Saint Denis".
You can buy and download this catalog from our website: CATALOGUE LEGRAS 1899 CRISTAL PANTIN et SAINT DENIS A TELECHARGER
Dimensions: Hight: 27 cm Diameter: 11,5 cm
Period: 1880 - 1910
GOOD CONDITION, only a few white spots inside, you won't see them when you will use the decanter.
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Here is a converter inches / cm to help you with the dimensions: