ABLA license (intermediate class) in 1964. My first ABLA race was the National Track Championships, held in the Kissena Park Velodrome in Queens, New York. (The only reason I was there was that the local bike shop owner had checked with the ABLA rep and confirmed that I was the only kid my age in Connecticut with a track bike - a Helyett Speciale. The race was a learning experience, if nothing else.)
Raced that same track bike in criteriums and short road races for a couple of years. At that time, ABLA rules still permitted the use of a track bike in road events as long as the bike had one working brake.