this is one of the handful of Vox mystery amps. They weren't in any Vox recorded but you can read about them in the Vox book. Copper panel 1964 JMI made with tremolo. 3 x 10 speakers ( a little ruff looking but sound good) . these are very cool and said to have been made by ox employees. This is a great collectable that will only keep going up ( the others listed are all over $3k) get it while you can.