Michael - not only reverse, but you also had front-and-rear-outs, you could sum the channels, assign both outs to a single channel and reverse that, as well. AND - the unit was a direct box, too! I remain longing for the good old days when all of these cool electronics could still be found! 8>)
BTW - I do not believe that Ron made all that many of these units, although the face plate did not appear to be hand lettered - Mica?
Chris