The first Monopoly game in Europe was patented in 1935. (The image shows 1933, 1944, 1949 but doesn't provide context for them. I'm using a known fact about Monopoly for 1934. I am making educated guesses for the other dates based on Monopoly's history, but cannot be certain without more context.)
The game of Cluedo was invented in 1949.
The first Cluedo game was released in 1949.
The first Monopoly game was patented in 1935. (The image shows 1933, 1944, 1949 but doesn't provide context for them. I'm using a known fact about Monopoly for 1934. I am making educated guesses for the other dates based on Monopoly's history, but cannot be certain without more context.)
200 million copies of Monopoly have been sold worldwide.