The photo album appears to be backward. If the word 'Album' is on the front of the book, it should be on the side Clyde is supporting.
Bugs tells Clyde that he was testing supersonic aircraft during WWII, but reliable supersonic flight did not become possible until 1947 (since the release date is four years after this event, supersonic aircraft had time to enter popular culture). Some WWII-era planes may have been capable of exceeding Mach 1 during steep powered dives, but no reliable records are available. In any event, Bugs had somewhat embellished his stories to Clyde.
Clyde looks at a picture of Bugs Bunny at bat, and then asks his Uncle Bugs if he was a baseball pitcher.