I don't know, but I do know that anyone wanting that much is a scam artist and anyone willing to pay it is a fool!
Bojack (Threads | Answers)
Bojack, please share with us the auditions you have conducted with Siemens CCa and Telefunken E188CC or Telefunken E88CC in your system.
Otherwise, which 6DJ8/6922 have you found to be exceptional, and in which components do you use them?