They are marked “Schott Zwiesel” on the bottom of the foot.
Schott Zwiesel Pure 23.4 Ounce Burgundy Glass, Set of 6: Wine Glasses: Wine Glasses
Schott Zwiesel Vina Large Burgundy Wine Glass, Pack of 6: Wine Glasses
SCHOTT ZWIESEL Red Glassware & Drinkware
Schott Zwiesel Fortissimo Large Bordeaux Glass - Set of 6, Glassware; UK Glassware Suppliers
Schott Zwiesel Taste Burgundy Goblet(Box of 6)
4 Schott Zwiesel Crystal Wine Glasses FOR SALE! - PicClick UK
Schott Zwiesel Taste Burgundy Glass - Set of 6, Glassware; UK Glassware Suppliers
SCHOTT ZWIESEL Red Wine Glasses for sale
Schott Zwiesel Ivento Burgundy Wine Glass (Set of 6)
ZWIESEL GLAS Pure Burgundy Wine Glasses
SCHOTT ZWIESEL Red Wine Glasses for sale
Schott Zwiesel Burgundy red wine glass Viña
Zwiesel Glas Tritan Stemware Pure German Crystal Glassware Collection, 6 Count (Pack of 1), Burgundy Red Wine Glass
Schott Zwiesel Pure 23.4 Ounce Burgundy Glass, Set of 6: Wine Glasses: Wine Glasses
Schott Zwiesel Burgundy red wine glass Taste