A few years ago, Mesa was selling russian tubes labelled 'Mesa russian2' which were excellent, creamy sounding tubes.
The Mesa tubes of today are JJ clones, maybe selected but the sound is the same, some like them, not me. The amps are working, yes, the clean sounds are correct but distortion (from preamp or pedals) sounds very dry...
If JJ is correct for you, ok it's 10euros...trust me, the Mesa are exactly the same 3times the price..!!