Excellent quality, and a very close reproduction of the Mullard/Philips type construction. These new production chinese 5AR4 seem to have less problems than the Russian or Czech made GZ34 tubes, and are now available at an excellent price!!! Just $14.99, Compare elsewhere at $18.00!!!
Mullard GZ32 NOS (branded Amperex)- Mint in original box wonderful sub for the 5V4 tube. Made in 1958! Just $199.99. This is a suitable replacement for any GZ32=5V4G=CV593 tube type. Various brands available.