A matched pair of almost NOS Ediswan 6922 manufactured in England in 1964, purchased from Upscale Audio, Platinum Grade. Ultra low noise, low microphonic tubes. These have less than 50 hours use, I marginally preferred the sound of the Amperex 7308 in my preamp so these are surplus to my needs. Sound is comparable to Mullard, though a little more neutral in the midrange and more extended on top. Paypal and shipping included at my asking price. I also have one Amperex 7308 available, also bought from Upscale, low hours but slightly noisy, suitable for use in a buffer stage. I will include that for an extra $30 if interested.