IT IS MODEL 480 BASE AMP.......2 TUBER...BOARD#751118......IT HAS SOME PARTS MISSING, CANT TELL MUCH FROM DRAWING,BUT KNOW THE DIODES ARE MISSING,& LOOK,S LIKE SOMETHING ELSE WAS NEXT TO THE DIODE,S....ALL ARE AT THE END OF THE BIG CAPS,BUT IT DOES HAVE THE DISK CAP,S THERE,BUT SOMETHING ELSE...