By June of 1948 Sanders Aviation Company had taken over sales and marketing of the Ercoupe.  The manufacturing was still done by ERCO.  This 2/3rd page ad appeared on page 69 of the June 1948 issue of Flying magazine.
<a href="https://en.wikipedia.org/wiki/Engineering_and_Research_Company" class="extiw" title="w:Engineering and Research Company">Engineering and Research Company</a>
1948-06
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