Bell System Specialties
Ad On Units To You And Me
The most popular ad on "The
4A Speaker Phone"
1964 picturephone, never put in
service it required to much bandwith.
A dial to TouchTone adjunt unit.
Fast upgrade to dial phones.
A loud speaker ad on.
A terminal for the def .
A touch a matic ad on, put speed
dial on any phone.
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