Just for anyone who is interested, there is a difference between shields and plates. All Siemens 6922/E88CC have gray plates. They made a chrome plate 12AU7 and you can’t mistake these, but as far as I know they never made chrome plate 6922s.
What the gray shields are are two vertical strips located beneath the getter supports where the supports attach to the top mica. The gray shields look just like the gray plates.
Siemens 6922/E88CC made after 1964 or 65 or so have silver shields and gray plates. A silver shield can be seen on the tube on the left in the picture in this ad from ebay. The M in Siemens is printed right over the top of the silver shield.
https://www.ebay.com/itm/E88CC-CCa-6922-6DJ8-Siemens-Matched-PAIR-NEW-NOS-SILVER-SHIELD-Strong-/182403712807
Why care? Back when I was buying tubes it was said that the gray shields were a far superior tube to the silver shields. The silver shields were described as being bright and sounded terrible compared to the gray shields. Even CCas come with either gray or silver shields.
Opinions change as stocks of the most desirable tubes disappear, though. Silver shields may be considered good quality tubes now. I don’t know. Anyway, if you’re buying Siemens 6922s you should know that there’s a difference between gray and silver shields.
What the gray shields are are two vertical strips located beneath the getter supports where the supports attach to the top mica. The gray shields look just like the gray plates.
Siemens 6922/E88CC made after 1964 or 65 or so have silver shields and gray plates. A silver shield can be seen on the tube on the left in the picture in this ad from ebay. The M in Siemens is printed right over the top of the silver shield.
https://www.ebay.com/itm/E88CC-CCa-6922-6DJ8-Siemens-Matched-PAIR-NEW-NOS-SILVER-SHIELD-Strong-/182403712807
Why care? Back when I was buying tubes it was said that the gray shields were a far superior tube to the silver shields. The silver shields were described as being bright and sounded terrible compared to the gray shields. Even CCas come with either gray or silver shields.
Opinions change as stocks of the most desirable tubes disappear, though. Silver shields may be considered good quality tubes now. I don’t know. Anyway, if you’re buying Siemens 6922s you should know that there’s a difference between gray and silver shields.