Offering for your consideration this rare original 1950s ECCO-FONIC promo sheet shown in the photos.(single page printed both sides).. No date evident but appears to be 1950s showing, on one side, the details of the revolutionary ecco-fonic tape delay and, on the other side , some of the Las Vegas performers of the time who were endorsing it.....as "The Greatest" ...and further..as "the big step beyond stereo"... Glen Thompson, John Adomono, Dave Apollon, Leo Diamond, Del Kacher "The 3 Suns" and "Teen Rockers"...extremely rare page...
..Photos show paper sheet (SOLD).

Clear complete PDF available