Help Identifying A Tube

[bridge500t]

I was tube rolling some different pre-amp tubes in my TSL 60 and one of the tubes I pulled out of it is labeled VLVE-20052 WK7. Any one have any knowledge of what brand of tube this or what it is exactly? I am assuming it is a 12AX7 but no idea what brand. Thanks!

 

[Gunner64]

Thats a 12ax7..i believe a Marshall factory tube

 

[bridge500t]

thanks! I wasn't sure if it was a stock tube or not since it had a couple of different brands in it already. I picked it up used and was doing some experimenting.