Audio Research 6dj8 Ecc-88 6922 W. German NOS 8 matched tubes same date codes

I have for sale (8) eight matched Audio Research labeled new old stock 6DJ8, ECC-88, 6922 vacuum tubes. I will offer free fed-ex ground shipping at my asking price. If you're looking to re-tube your Audio Research preamp or line stage these tubes would be an excellent match. Of course, they will also work equally as well in non Audio Research equipment too. These are high quality Western European tubes which are regarded as some of the best NOS tubes available. The tubes are coded as Ecc-88 which is the European version of the American 6dj8 tube. The 6922 is the Russian industrial version of the same tube. All 3 tube types are interchangeable
I have additional tubes available, so if your looking for more or less than 8 tubes please email me and I can adjust my price. These tubes are vintage NOS tubes and have never been used. The date code on the tubes are all from the same week 1983....it's extremely rare to find NOS tubes for reasonable prices with the same date codes!! The lettering on the tubes say Audio Research Corporation, 32001100 (Audio Research's part number) ECC-88 made in W Germany. These tubes are part of a 100 tray factory direct lot, so they do not have individual boxes but I will package them in brand new generic tube boxes for shipment. Because the tubes are from the same week of manufacture, they are very closely matched typlically 2% to 5% and I test all tubes on a mutual conductance tube tester for further matching. I also tested the tubes for shorts and leakage and they passed all the tests. The tubes were acquired from a local collector in the Minneapolis area which is where audio research is located. I've had many satisified audiogon customers and many repeat customers who have purchased these tubes.
Shipping will be free via Fed-ex ground or an additional $2 if using US post office priority mail. I always carefuly double box all my Audiogon items for shipment.
NO INTERNATIONAL SALES, Continential USA sales only.
For payment, I accept paypal and USA post office money orders and personal checks. Personal checks will be held for 4 business days to allow the funds to clear. I will absorb the paypal and audiogon fees. I will also combine shipping if buying some items from my other tubes ads.
Audiogon members with no feedback please email me before making an offer to purchase. I do not use the buy it now option due to international buyers or members with no feedback. If you would like to purchase the tubes at my asking price just make an offer at the asking price.

If you have any questions about these Eight (8) NOS Audio Research labeled 6DJ8/6922/ECC-88 tubes please email me. Thanks.