Set of 5 vintage coloured glasses - glassware from Boussu

Set of 5 coloured glass tumblers (one blue, one grey, one green, and two purple), series "Mary", model "Whisky", created by Zéphire Busine for the glassworks of Boussu in the early 1960s. They are in very good condition, with no noticeable damage. However, there are bubbles and slight differences between the glasses, which is quite normal for mouth-blown glass. Dimensions: Diameter: 6.5cm, height: 12.5cm.