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Black Box Stock Tickers


Open-Air Black Box Ticker

I'm sure this design ran cooler than other black boxes.  Typically, they could get 40 degrees above room temperature, which was nasty in the summer.  But all those holes also meant more noise, so a large sound-deadening cover was made to keep it quiet and prevent hands from being scalded.




The Black Box Ticker


Open-Air Black Box Ticker


Interior Workings


Canadian Black Box Stock Ticker


Bid and Offer Deleting Ticker


Black Box Sports Ticker


Exchange Telegraph Stock Ticker

Edison's Universal Stock Ticker

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Stock Ticker Census

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