Batman (1940-) #410
I didn’t realize Jason Todd was around for so short of a time before… well later events.
This is the 2nd introduction of Jason Todd as Robin. He was previously introduced Pre-Crisis in 1983 in Batman 357. That version of Jason Todd was part of a circus family that was killed by Killer Croc (In a story that marked Killer Crocs first appearance.).
Look for the Marx Brothers strolling thru the casino on page 14 (pg. 15 if you count the cover)