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 $19.99 per tube
NOS 53KU- Cossor Made 1948-1953 brown base/grey plates- solid round disc side getter halo in original Cossor boxes! The best of the best! Made by A.C. Cossor / Cossor House Highbury Grove/High Wycombe UK.
$899.98 for the matched pair( Please note: Only one matched pair is left in stock; identical matching at 198mA/198mA)