Mesa STR-415 Green Label Tubes?

[mreeve25]

Hello All,

I got a matched quad of Mesa STR-415 Green label tubes, to go in my 60 Watt C+. I will obviously only be using 2 at a time.
I am curious what the difference is between the blue label and the green label. I got a good deal on them, and the are practically new. These are my 1st STR 415's. What can I expect compared to basic str 440's that you can buy at guitar center now?

Thanks!!!

 

[Elpelotero]

an old thread on the matter: http://forum.grailtone.com/viewtopic.php?t=17233