At last, I got my hands on this sweet Maradona rookie card from 1977.
On 20 October 1976, just a few days before his 16th birthday, Diego Armando Maradona made his professional debut with Argentinos Juniors. He played there for 5 years, scoring 115 goals in 167 appearances before his extremely pricey transfer to Boca Juniors.
This disc card was issued in Argentina during 1977 and it is the very first card depicting Maradona. He was then only 16 years old. It is extremely rare.