Advertisement for electrical training from the Coyne Electrical School of Chicago, Il. Advertisement from the back cover of the pulp magazine <i>Amazing Stories</i> (April 1926, vol. 1, no. 1).
Unknown author<span style="display: none;">Unknown author</span>
1926
<a href="//commons.wikimedia.org/wiki/File:Amazing_Stories_Volume_01_Number_01.djvu" title="File:Amazing Stories Volume 01 Number 01.djvu">File:Amazing Stories Volume 01 Number 01.djvu</a>