They are marked “Schott Zwiesel” on the bottom of the foot.
Schott Zwiesel Tritan Crystal Taste Bordeaux Red Wine Glass, 656 mL - Box of 6, Furniture & Home Décor
Schott Zwiesel Pure Burgundy Glass - Williams Sonoma Australia
4 Schott Zwiesel Crystal Wine Glasses FOR SALE! - PicClick UK
Schott Zwiesel Pure 23.4 Ounce Burgundy Glass, Set of 6: Wine Glasses: Wine Glasses
SCHOTT ZWIESEL Red Glassware & Drinkware
SCHOTT ZWIESEL Diva Series Burgundy Goblet (Box of 6)
Schott Zwiesel Tritan Crystal Diva GK Burgundy Red Wine Glass, 480 mL - Set of 2, Furniture & Home Décor
Schott Zwiesel Pure Burgundy Glass - Set of 6, Glassware; UK Glassware Suppliers
Red Burgundy glass Journey
Zwiesel Glas Tritan Vervino Collection Burgundy Red Wine Glass, 32.2-Ounce, Set of 6: Wine Glasses
Zwiesel Glas Tritan Stemware Pure German Crystal Glassware Collection, 6 Count (Pack of 1), Burgundy Red Wine Glass