Logo for the <a href="https://en.wikipedia.org/wiki/Bell_System#Pre-1984_breakup" class="extiw" title="w:Bell System">Bell Operating Company</a> serving <a href="https://en.wikipedia.org/wiki/Pennsylvania" class="extiw" title="w:Pennsylvania">Pennsylvania</a>.
Drawn by <a href="//commons.wikimedia.org/wiki/User:The_Navigators" title="User:The Navigators">The Navigators</a>.
This <a href="https://en.wikipedia.org/wiki/vector_image" class="extiw" title="w:vector image">vector image</a> includes elements that have been taken or adapted from this file: