I have no idea what years they were, but they all sounded great! I was getting them for $1600 each sometime around 2011 or so,hence the flip phone pics. There was another guitarist that was borrowing one at the time for touring/recording(usually the one with the white knob). I only kept one that had sentimental value and sold or traded off the others. It was crazy that you could get them at that price back then, and honestly I did have a real thing for a long time about having a backup on some amps. Two Marshall's, two ENGLs, three Randalls, etc.