Antique French cut glass enamel tumbler swan gryphon (1085)

Outstanding and rare cut, acid etched and enameled glass tumbler. Made 19th century. Believed to be French. 5 1/8inches high. Tumbler is cut in regular geometric pattern with elongated facets in a band around the bottom, narrow part of the glass. Upper rim is gilded. The main decoration consists of a deeply etched, enameled and gilded pattern. Cobalt blue with some burgundy / red enamel and lots of gilding. The central theme is pairs of mirror-image gryphons / swans separated by scrolling foliage. The quality of this work is without parallel.Condition is very good except for negligible wear to gilding on rim.