I bought a used WAL power amp and preamp way back in the early 1960's when I was in the US Air Force. I was at Brize Norton AB on temporary duty at the time and bought them plus a pair of WAL cabinet speakers. The amp overheated due to being in an unvented cabinet when someone closed the doors. It was too far gone to fix so I junked them. Sorry no pics but the preamp had an horizontal oval face with a large cream colored knob at each end. There were some other switches and controls between the large knobs. I still have the speakers however and they are undergoing a cosmetic refurbishing. They were residing in the basement for some 30 years and I recently bought a Sherwood stereo receiver. I thought they would be a good match so I got them out. The innards looked good, no rust, so I tightened a few loose connections and started sanding. They're not quite done yet, restain and varnish in progress, so I can post some photos when they are ready. I ran across this thread when I searched WAL to see if they were still in business. I don't know if this helps but I thought it made a good story.