Made in the early 1960s, these Mullard 12AX7 tubes are some of the most musical 12AX7s ever made. Mullard 12AX7s sound GREAT in anything they are installed into. These tubes feature copper gridposts and that Singular Mullard quality of extra detail and definition in the midrange as well as airy, extended treble. I bought these phonograde "green tip" 12AX7s from Vintage Tube Services just over 10 years ago and briefly installed them in my Audio Research SP6 just to check them out. They are basically unused, but I believe in full disclosure so I'm calling them "As NOS" or "Almost NOS". These Mullard 12AX7 "green tip" phonograde tubes meet the rigorous standards set for any Vintage Tubes Services super low noise/low microphonics Phono-grade 12AX7 tube; thus, they will match superbly with any moving magnet or high-output moving coil cartridge and sound great in any phono application. These really bring vinyl to life. Before listing them for sale I tested them on my Hickock Cardmatic; they came in at 94/99 and 93/98, out of 100 max and 60 minimum. These Mullard 12AX7 tubes were labeled as OEM-selected tubes for Fisher by Mullard; like all early 1960s Mullard tubes, the white lettering on the glass is extremely fragile and wipes off easily; this pair's print is better than average but to be conservative I give them 7/10 only for the minor lettering smear; very nice tubes, electrically/sonically PERFECT and hard to find these days. NO EXTRA FEE FOR PAYING VIA PAYPAL; shipping via USPS is just $4.95 INSURED to the USA.