This is my favourite amp at the moment (I have posted this picture before) 1965 National Glenwood 90, made by Valco. 2x12 Jensen ceramic speakers, 35 Watts and runs off 2 x 6L6's and it is solid state rectified. There are 2 x 12ax7's, 3 x 6eu7's and a 6973 reverb driver. There are a number of features on this amp including Hammond long reverb & a thick swampy tremolo. It's 2 channels and both allow you to switch between bass, guitar and treble guitar settings. It would have been National's top of the line. It sounds amazing. It has the signature Valco "bark". I guess because it's SS rectified, it has very little sag which gives it spank and punch. It can be a very bright sounding amp...I find myself on the neck pickup mostly when playing it. Interesting fact about this amp; The reverb was not working when I got it. A very good local tech repaired it, telling me that there was a metal washer where there should have been an insulator on the input for the reverb footswitch. This sent the signal straight to ground. The tech was certain that it had left the factory this way...the reverb hadn't worked for over 50 years. Once repaired, the reverb sounds great.