LALIQUE » BOUCHON TROIS HIRONDELLES (THREE SWALLOWS STOPPER), FRANCE, INTRODUCED 1920. The back of the stopper features deeply hollow molded swallows in flight. The front of the stopper is smooth. This great tiara stopper captures the effect of birds in flight. The stopper also takes an asymmetric scene and turns it into a symmetrical object. This feature along with the greatly stylized birds are great examples of art deco, 1920.Virtual Museum | International Perfume Bottle Association.