These Pretty Crystal Etched Optical Wine Glasses are a set of four vintage round wine glasses, originating from America in the mid-century modern style. Handmade with elegant glass production techniques, these crystal glasses feature etched patterns and a glossy finish. With a capacity of 6oz and a height of 5 3/4 inches, these wine glasses are perfect for all occasions and are a beautiful addition to any barware collection. Made of glass and crystal, these unmarked wine glasses are a unique and stylish choice for hosting gatherings or enjoying a relaxing drink at home. I am unsure of manufacturer and manufacturer dates.