Vintage photos of:
Washington, D.C., 1924. "The latest in electric baseball scoreboards. George Coleman, inventor, is shown with the mechanism of the new scoreboard." Harris & Ewing Collection glass negative. View full size.
A backstage view of Washington, D.C., inventor George Coleman's "Lifelike Baseball Scoreboard" (seen earlier here and here), which was set up in movie theaters to "broadcast" the home team's away games. "It contains 19,000 feet of wire and has 400 stereopticon slides with an electric light bulb for each slide. Five men are required to operate the great board, including the telegraph operator who receives play-by-play from the field."