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Vintage NEW Replacement 2500 / 2554 / 3554 Touch Tone Dial Pad - SKU - 24805 | eBay
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Touch tone telephone key pad for Western Electric, Stromberg Carlson and ITT telephones such as the 2500and 2554 model | Phone Shop
Tone dialing telephones are introduced, November 18, 1963 - EDN
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WCSA – On This Day – November 18, 2018 - Tone dialing telephones are introduced, November 18, 1963 - WCSA.WORLD
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