Audio Research 6dj8 Ecc-88 6922 NOS tubes W German 8 matched tubes

I have for sale (8) eight matched Audio Research labeled new old stock 6DJ8, ECC-88, 6922 vacuum tubes. 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 6dj8 is the American version, Ecc-88 is the European version and 6922 is the Russian industrial version of the same 6dj8 tube type, they are all interchangeable. I'm offering free Fed-ex ground shipping at my asking price.
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 1983. 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 and all the tubes were manufactured during the same week of 1983...it's extremely rare to find a matched NOS tubes from the same week of manufacture at resonable prices. Because the tubes are from a 100 tray lot, I do not have individual boxes but I will package them in brand new generic tube boxes for shipment. The tubes 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.

Shipping will be Free via Fed-ex ground or $2 additional if using US post office priority mail. I always carefuly double box all my Audiogon items for shipment. I can ship either Fed-ex ground or USPS priority. 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. If you have any questions about these (8) NOS Audio Research labeled 6DJ8/6922/ECC-88 tubes please email me. Thanks.