From this old thread, it appears it was part of Hammond and Chambless..Another long deceased company..You might try some of the emails in this thread, to see if anybody is still around..

http://greenspun.com/bboard/q-and-a-fetch-msg.tcl?msg_id=00CSfG

Hope this helps Christy..

It Don't mean a thing if it aint got that swing.

Cool, Free, Johnny Smith courtesy of NPR..HERE
http://www.npr.org/ramfiles/asc/asc25.smith.asx