Editing Indian-head test pattern (section)

===Artifacts===
Nearly all of the hard-to-open, steel-shielded monoscope tubes were junked with their Indian-head test pattern target plates still inside, but many of the board-mounted lithographs survive.

The master art for both the portrait and the pattern design was discovered in a dumpster by a wrecking crew worker as the old RCA factory in [[Harrison, New Jersey]] was being demolished in 1970. The worker kept the art for over 30 years before selling it to a collector.<ref name="Pharis">{{cite web|url=http://www.pharis-video.com/p4788.htm|title=Chuck Pharis Web Page : The Indian Head Test Pattern Story! , Updated April 29, 2017|website=www.pharis-video.com}}</ref>