1980s Sergio Asti for Vistosi Sixties Collection Luigiona & Lingham Murano Glass Vases- Set of 2

Sergio Asti for Vistosi, Sixties collection, Luigiona and Lingham works. Both signed on bottoms and numbered 6 of 33 and 16 of 33 (respectively).
Dimensions: 5″ height x 10.5″ diameter 14″ height.
Provenance:
Property from the Estate of John ‘Parker’ Prindle, Jr., Boston, MA.
Asti designed the collection for Vistosi Vetri D’arte in the 1960s and it was put in limited production produced in 1980s. These pieces feature “marmorizzato” (marbled), filigree and plain color, with extensive use of “lattimo” (milky glass). The whole collection of 8 models was thought to be repeated 33 times per color, but the number was never achieved because of high production costs. So it is more likely that it was approximately 20 pieces per design. I have never seen a piece numbered over 16. Both pieces are signed and numbered. The measurements of the individual pieces follows in the order that the individual pieces are shown in the photos:
Lingam: height cm 33/13” #16/33
Luigiona: height cm 12,5/4.9” diameter cm 27/10.6” #6/33.