I order two pairs different French tubes.
RTC Military, 70s or early 80s. Dirty cheap, $5 each.
Pics from seller, update when I received.
Mullards has best soundstage, but bass is a little bit much for me.
I found Cifte is better smooth and high if compare with Mullard, but smaller soundstage and less bass. But nice with female vocal, sweet!
Pictures from a audio forum "My Hiend" in Taiwan. http://www.my-hiend.com/vbb/showthread.php?6554-2013%E5%B9%B4-CES-and-T-H-E-SHOW-%E5%AF%A6%E6%B3%81%E5%A0%B1%E5%B0%8E&p=190130#post190130
4-Pin XLR on the front. cool