This is a Matsushita gold pin 12ax7a made for Realistic in Matsushita Japan. After WWII tube manufacturers in Europe and the US shipped their tube making equipment to Japan to take advantage of the lower labor costs. Amperex, Mullard, and Raytheon made millions of tubes in Japan. These tubes were made on the same equipment with the same materials, and the same construction methods used to make the Mullards and Bugleboys that we love so much. These tube have the same quality and the same excellent tone, and longevity as the Europens and American made tubes.