This 28 Dot display developed by Hewlett-Packard was the first LED display package available on the market.  This is a true dot display as each individual dot is a separate LED.  Custom displays were developed for Electro/Data to use in their prototype clock and prototype  44-IC module. The scan above was an early version and varies slightly from the displays used in the prototype clock and watch module. Click on the link to the factory Data Sheet for the HP-5082-7000 PDF

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