The number is located on the top of the unit in reverse yellow paint.
overall: 7 in x 3 1/2 in x 8 in
There are 12 tubes and 2 pinch tipped bulbs located on the top of the unit. There are 2 silver pull handles on the top of the unit. There are 17 male banana plugs on the bottom of the unit that are attached to the tube sockets with resistors/capasitors. There are 2 two pin microphone screw connectors as well on the bottom.