This is an accurate picture of OSO 7, NSSDC ID: 1971-083A.
NASA (probably Ball Brothers' Research Corp, subcontractor on OSO 1 through OSO 7).
OSO 7 is dispayed at NASA Heasarc, url=<a rel="nofollow" class="external free" href="http://heasarc.nasa.gov/Images/oso/oso7_flight.gif">http://heasarc.nasa.gov/Images/oso/oso7_flight.gif</a>.