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 Tritan Crystal Taste Bordeaux Red Wine Glass, 656 mL - Box of 6, Furniture & Home Décor
Zwiesel Glas Pure Tritan Crystal Stemware Collection Glassware, set of 4 (Pack of 1), Pure Burgundy Red Wine Glass, 23.7 ounces
SCHOTT ZWIESEL Red Glassware & Drinkware
Schott Zwiesel Burgundy red wine glass Viña
Schott Zwiesel Tritan Crystal Diva GK Burgundy Red Wine Glass, 480 mL - Set of 2, Furniture & Home Décor
Zwiesel Glas Pure Tritan Crystal Stemware Collection Glassware, set of 4 (Pack of 1), Pure Burgundy Red Wine Glass, 23.7 ounces
SCHOTT ZWIESEL Red Wine Glasses for sale
Schott Zwiesel Pure Burgundy Glass - Williams Sonoma Australia
Schott Zwiesel Vina Large Burgundy Wine Glass, Pack of 6: Wine Glasses
Set of SIX Schott-Zwiesel Excelsior Red/Burgundy Wine Goblets Mint
Schott Zwiesel Vina Range High quality glassware
Schott Zwiesel Pure 23.4 Ounce Burgundy Glass, Set of 6: Wine Glasses: Wine Glasses