Here is a matched pair of Vintage 12AX7 / ECC83 made by TELEFUNKEN, have both diamond on bottom, made in Western Germany. They both test very strong, have ribbed plates and halo getter, reading are 40/42 & 40/40 were 32 is Good 65% and most of new test 49. You will hardly find better pair anywhere. Price is fair and firm.
Canada USA shipping is 10$, Worldwide 15$. They will be safely packaged.
All tubes are tested with my personnal hickok tester