Special price on a spare set of these that I have. The GEC A2900 is as good as it gets for the great 12AT7 tube. This pair is the double-mica ring getter version. Manufactured in the Hammersmith factory in November 1972. Tested and guaranteed quiet. I'll offer a 1-week return if you don't like them in your system. Shipping and insurance is included. Payment of PayPal fees is appreciated but not required. Thanks for lookin'! I have many more tubes to list soon. Let me know if you need anything.