Not sure if these are nos…selling as used. (1) Mullard Amperex 7025 tubes made at the Blackburn England factory. (3) available. O getters. These tubes were tested on my calibrated TV7-D/U for shorts & Gm (see photos). Also tested for emissions on my freshly refurbished B&K Dyna Jet 606 (see photos for test results). Minimum/Good on the TV7 is 32. Amperex tube boxes shown are included.