Just having a weeding out of my Valve collection, All have been tested in my Vitale/Series 5 and work well.

2 x National Electronics ECC83 12AX7A Matched
1 x Harma ECC83
2 x Chinese ECC82/12AU7
1 x Mullard ECC82
1 X SOVTEK 12AX7WA/ECC83
1 X Unbranded ECC83/12AX7

£38 Can be collected from North London, or we can meet along M11, Postage to UK £5