Final 0.4 mkIII help needed

I have just come into possession of these speakers. I'm hoping to bring them back to there former glory, no sound from the panels. Can anyone help out the specification of these speakers, panel range, cross over point.

So far, I've obtained suitable power supplies to charge the panels, discovered blow fuses (T800mAL) which will be replaced in the next step on the path to discovering there sound. I believe the quad 606 power amp I have will be adequate to drive them.