This amazing collection came from Mark in Michigan! Quite an impressive amount of redlines! As a reminder A "Redline" Hot Wheels car is one that was manufactured within the first ten years of production, 1968 to 1977. The term "redline" derives from the fact that, during that period, the cars were manufactured with a red stripe on the tire. If you or anyone you know may have some in the 1968-1977 timeframe Please shoot me a message!