New old stock Mullard 12AT7WA/CV4024 tubes. Original box, sleeve and pin protector. 1983 date codes. I purchased these tubes in the late 90s and they have sat unused ever since. All tubes measured for shorts, gas, leaks and transconductance on a Triplett 3444 tester. Tubes also tested for noise and gain with a George Kaye Audio Labs Small Signal Tube Checker. Listing is for one tube, five currently available.