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Nice work in mixed media and collage on paper.
The work was made by Flavio Piras (1956), an Italian artist who works primarily conceptually. He sends a large part of the works he makes by post, so that the traces (such as stamps) that the postal system leaves on the work become part of the work.
Here is a brief description of Piras' work and how it comes about: https://www.vaccarinews.it/news/Il____viaggio___di_Flavio_Piras_passa_dalla_posta/11148
Not much of his work appears on the art market and certainly not outside Italy, that is why this is a unique piece of art from Italy that you will not find anywhere else.