Moser, signed Alexandrite centerpiece with 2 matching vases

Hand blown, optic rib, flaring center bowl and two matching vases. The Alexandrite reactive glass changes color in diffferent light spectrums, going from blue to lavender, for which Moser was famous. The three Moser matching vases can be used indiviually or together as an unusual centerpiece grouping. The centerpiece is 9 1/2" tall and 11 1/4" in diameter and the vases are 7 5/8" tall and 6" in diameter. ca. 1910