Peter Drefahl later replaced a noisy AC701and did some work on the electronics.
Previous to that it was serviced by Neumann, who did an overhaul and replaced the KK47 capsule, the rubber shock mount inside and repaired some minor issues.
So anything non-original uses the best components recommended & installed by the manufacturer or Peter, who is a well-known and highly qualified engineer.
The power supply is a brand new Schaal PSU, bought by the previous owner. He got the mic as a gift from a TV studio that he rebuilt as an engineer. So the Cable and PSU are brand new.