Wittman Buttercup, 75 years
Starduster, 55 years
Little Toot, 55 years
Dyke Delta, 50 years
Fly Baby, 50 years
Headwind, 50 years
Acro Sport, 40 years
Pazmany PL-4, 40 years
KR-1, 40 years
Variviggen, 40 years
Van's Aircraft, RV-1, 40 years
Aerocomp, 25 years
Bearhawk, 10 years

Not a comprehensive list, but feel free to add to it!