Conversation so far:
when was Ernie Kovacs born?
in difficult financial times for the family.
When Kovacs began drama school, all he could afford was a fifth.
did he finish drama school?
Academy of Dramatic Arts in 1937.
Are there any other interesting aspects about this article?
1938 local newspaper photograph shows Kovacs as a member of the Prospect Players, not yet wearing his trademark mustache.

Question: when did he start wearing it?
Self-contained rewrite: When did Ernie Kovacs start wearing a trademark mustache?