MESA PREAMP TUBE ID.

hi all..
been going through a bunch of tubes and came across some mesa tubes that were in my 2:90,,,used for the phase inverters inside the amp
thinking of using one or two in my MKV combo...just got a few more of these on ebay as they seem pretty hard to find.
so can anyone tell me what these tubes are....not sure if they are russian or some other european tube.........and thanks to farren for helping me to learn how to post images here on the forum :?

I dont see any pics.

i will try to post another one not sure what the problem is..........just a noob!!
here it is again.....

hope this works

Those are Ei (Yugoslavian).

I realize this is an old thread. But I haven't looked here in quite a while.

- Thom