Set of 4 wine glasses in Saint-Louis cut crystal Model SYLVA from 1930 engraved with acid

These lovely wine glasses are made of st. Louis crystal. This set includes 4 glasses of 13.5 cm height. It is a crystal service engraved with acid with a decoration of garlands and palmettes. This form is listed in the 1930 st. Louis catalog under the name sylva, but the engraving is different - here it is a "rock crystal" engraving. They are not signed. In good condition, these lenses measure 13.5 cm high and 7 cm in diameter. I report a shard at the foot of a glass.