Conversation so far:
When did the Silver Age of the Batman comics start?
The Silver Age of the Batman comics started as the series continued during the rise in popularity of mystery and romance comics
What was the first comic book that Joker was in during the silver age of Batman comics?
In 1951, Finger wrote an origin story for the Joker in Detective Comics #168

Question: What was a Joker appearance during this era?
Self-contained rewrite: What was the Joker's appearance during the Silver Age era of Batman comics as introduced in the Joker's origin story?