[Amps] orphan amp?

[carl seyersdahl]

  Can anyone here identify an amp built by B&W
    model PT-2500-A ??? A friend of mine has one he got for peanuts, it has
2 3-500s , one of which is bad, the meter is bad and who knows what else
might be wrong, but he needs the manual and all help he can get.!!
   I will help him as much as I can , but he lives 150 miles from me so it
isn't easy. Any help will be appreciated.!!
    carl / kz5ca