The bottom is printed "MONGOLFIERE FORNASETTI MILANO MADE IN ITALY 1955". etc
The plates are # 2, 6, 7, 12 in the Mongolfieri (balloon) series out of 12 plates.
In this collection of plates, Fornasetti inventively depicts the history and evolution of the hot air balloon (palloni or pallone) throughout European history. The Montgolfier brothers pioneered the use of hot air balloons in the 19th century - hence the name of Fornasetti's whimsical and somewhat surreal series.