Simplify the following text for a Grade 11 native English-speaking person.
Original: Pontedera is the headquarters of the Piaggio company , from the 1930s one of most important Italian manufacturers motor vehicles such as the Vespa and the Ape .
Simplified: It is the headquarters of the Piaggio company , which in the 1930s was a major aircraft manufacturer and which now manufactures motor vehicles such as the Vespa and the Ape .