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Working Vintage Zenith System 3 "Color Sentry" CRT television from the mid-1980s - $140 (Warwick)
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The "Color Sentry" System: Located in the top right, this feature automatically adjusts the picture brightness, contrast, and color balance depending on the ambient light in the room.
Digital LED Channel Display: A classic signature of 1980s Zenith sets, displaying the channel number in green numerals.
The Membrane Keypad: The flat vertical control panel on the right features a numeric keypad and channel scanner. On many variations of this chassis, this panel flips open or hinges forward to reveal hidden secondary analog controls for manual picture adjustment.