Exceptional sounding Reverberocket from 1963, angelic at low volume, plenty of hair when pushed, just what you want.  This is the R-12-R-B circuit one with 7591 power tubes, rich and exotic. We've replaced the non-original reverb tank with a three spring, long delay, long tank, which now produces that long lush reverb that Ampeg are famous for.  Combined with deep tube bias trem and you have a beguiling vintage package.  Best of all, a period correct Alnico Jensen P12Q, a significant upgrade from the typical stock C12R.  All in all, this is the best Reverberocket I have ever heard.  Sports a very rare stock UK transformer, no need for a step down.  Just as unusually, the handle appears to be original.  Suprisingly light.  Vintage Ampeg guitar amps remain criminally underrated.