Set of 6 vintage champagne glasses from Schott Zwiesel Germany 1970s

A set of six handmade glass glasses produced in Germany for Schott Zwiesel Glass in the 1970s. Champagne glasses with a narrow, cylindrical shape and a distinctive modern minimalist style. Glasses in very good original condition, with few signs of use. Made of hand decorated lead glass. Some of the glasses have stickers with the signature. Dimensions: height 16 cm diameter 5.5 cm diameter of the base 5.5 cm diameter of the entrance 5 cm Dimensions in inches: height 6.3 in diameter 2.2 in base diameter 2.2 in entrance diameter 2 in.