The number is stamped in reverse white paint on top of the unit.
overall: 7 in x 3 1/2 in x 8 in
There are 12 tube sockets on top of the unit with 11 tubes present. There are 3 pinch tipped bulbs on top. There are 2 silver handles. There are 32 male banana plugs on the bottom of the unit that are connected via resistors to the tube sockets.