By Carlos de Paula Several European championships emerged during the early seventies, many of which did not survive many years, including the European GT Championship and European 2 liter championship. The Interseries was not a FIA championship, and maybe because of that reason, survived until the early 2000s, although in the latter guise it was but a shadow of its former self. Read more about if here https://www.amazon.com/dp/1732674426 Leo Kinnunen