I read deeper into the comments section. Tele labs replied, and it sounds like this tube is just a high quality JJ with a special cryo process and higher quality control. They also specifically state:
"The simple answer you're searching for is no. The black diamond tubes are made for us by JJ with their current processes and equipment.
Again, and not that you have accused us of this, but we have never made claims towards reconstructing these with original Telefunken GmbH's machines, materials, etc."
