Possible Clues:

• 1950, in copyrights
• When the Korean War started
• Year the Korean War began
• Korean War outbreak year
• Cato's 1,950
• Credits date for 'Cinderella' or 'All About Eve'
• Ovid's 1,950
• 1950, on a cornerstone
• Caesar's 1,950
• Year on a Truman-era cornerstone