Wrigley Field is the one of the last ballparks to use a manually operated scoreboard (Fenway Park being the other).  The scoreboard was installed in 1937 when the new bleachers were installed. It is still the original scoreboard that is present and has only seen a few minor changes throughout its history; clock was added in 1941, addition of the 5th and 6th score lines, in 1988 lights facing the scoreboard were added with the addition of night games and finally an electronic message board.  Since Wrigley is a registered landmark, the scoreboard cannot be moved.