Large ashtray in solid crystal modernist design monogram "sa" art

Elegant & old ashtray modernist atypical era 1960 - 1970 approximately... Decorative art of the design table. Unique collector's ashtray, showcase, smoker's object... Glassware cristallerie d'art. Crystal crystal thick solid. Worked by hand. 24% pbo. Monogrammed by engraving "sa" at the bottom. Square & concave/convex geometric shape ashtray. Excellent condition, no wear, scratch, shine or other... No trace of use or manipulation. Very beautiful shine with great brilliance and transparency in light. Height - 8 cm. Dimensions high - 12x12.5 cm. Dimensions low - 11.5x9 cm. Net weight - 1, 700 kg. Work in the taste of daum, sèvres, art vannes, bayel, baccarat, vallerysthal, vierzon thouvenin, Saint-louis, jean faucheur, lalique, murano, gallé, lehrer, portieux, vallerysthal, fains, bohême, cristallerie d'arques...