Guilloché crystal water (or wine) glasses, 19th-20th century (set of 6)

6 guilloche crystal water glasses. Possibly late 19th early 20th century, prolific period of the guilloche technique. But what is guilloche. A technique of hollow engraving by removing material and decorations of lines, curved and wavy lines that intertwine or often cross. Good condition, nevertheless some small manufacturing defects on the decoration in places or bubbles. Red wine glasses, white wine glasses and champagne coupes of the same model are also available. 📐 diameter 8.2 cm X height 15 cm weight of 6 glasses: 1080 gr.