Progetti bowls set of 4, new in box with tags

Hi fellow collectors! I discovered this set of 4 satin not frosted (but smooth all over) bowls at a local thrift shop because they just felt really special.

I am not so sure now after searching everywhere for information and coming up empty handed. I see that Progetti was/is a beautiful studio that had a line of glassware but I cannot locate another set like these bowls.
Can anyone here please help me unearth another set like this, or point me in the direction of where to look? Any Italians or those fluent in Italian may be more familiar with the brand I suspect.

Many many thanks for your help!
Label information on the outside of the box reads as follows:
mod: 58
COPPETTA c. 4 p.zi ??
vetro soffiato satinato

Designer: studio P
Progetti Modello depositato made in Italy
Off to the right reads: each of our (cannot read) shows the ability of our master workman and it is completely handworked and mouth-blowed following the ancient and traditional system of glassmakers art. Every difference in deepness, thickness, lightness or air bubbles in the crystall they are nothing but the demonstration of the artistic, handmade, kind of work we make. Made in Italy.