Maybe the very best of the best!
I found a great deal on 8 of these tubes awhile back from a guy locally who is an old school tube radio fanatic. I tried them first in my blues jr. Nos with the BillM mods and was instantly blown away! Super clear, deep, warm tone! They are expensive but I actually think they are worth it! I would only get these if you are a real tube lover who wants a very authentic vintage tube experience. These are definitely the very highest quality nos tubes you can get in my opinion. In Fender amps they will win every single time over the mass of 12ax7 tubes out there. I love them!