Western Electric 1500D (1963-1967)

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Western Electric 1500D 

🥇First Commercially-Released Push-Button Telephone 

The Western Electric 1500D, manufactured in the mid-1960s, was the specific technical designation for the standard, single-line desktop model of AT&T’s historic 10-button Touch-Tone telephone. To the average user, the "D" suffix simply meant it was a standard desk phone built on the highly rugged, heavy-duty foundation of the older Model 500 rotary series, utilizing the exact same internal "500-type" base, handset, and mechanical ringer. The defining feature of the 1500D was its mechanical 10-key layout, which lacked the modern pound (#) and star (*) keys, meaning it was used strictly for traditional number dialing. Beneath the plastic faceplate, pushing a button physically pressed down on a set of internal slider switches that activated precision tuning coils to produce the signature "musical" Dual-Tone Multi-Frequency (DTMF) beeps. Because the Bell System quickly realized that computer automation and future banking services would require the two extra characters, the 1500D was phased out after only a few years of production in favor of the 12-button 2500D model, making surviving 1500D units a highly sought-after prize for vintage collectors due to their heavy-duty "built-to-last" construction and short manufacturing window.

Acquired from: eBay.com