WESTERN ELECTRIC AND THE BELL SYSTEM - Beatrice Co
The Model 28 unit which was first introduced to Bell System service in 1954 is still the hard core of service use. The Model 28 series operates at up to 100 words a minute for page teletypewriters and up to 200 words a minute for some tape punching units. The previous model - No. 15 - operated up to 75 words per minute. ................
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