Sure, post them. there's some distinguishing characteristics. Sometimes the diamond isnt' really clear, and sometimes (rarely I think) not present at all. more importantly how do they sound?
Thanks Ed...I will post soon. I just popped them in, and I like what I hear so far. The soundstage is wider and more focused. My sweet spot is back. I don't want to prematurley judge them since I just realized last night the Siemens set I had in were bad. My highs were crackly and screachy. Made my metal dome tweakers sound like metal. I have some Amprex and Sovteks I want to compare with the Telefunken.
Rec: not sure to be honest. I'm a neb with tubes, but the one thing I have learned so far, is never say never.