The bass is original, except for the potentiometers I replaced with the original CTS and a new swichcraft socket. I am the second owner since new. The first owner in the 90s replaced 2 volume potentiometers, so I had no problem with that to replace them with a new CTS now. In addition, I replaced the TONE potentiometer (the original 77 has). I will add the original TONE potentiometer to the bass. The capacitor, of course, is primary. Replacing potentiometers at a professional martch.pl luthier
Everything else is original.