Trying to get a metal base GZ34 from eBay and I came across a Valvo brand NOS GZ34 tube that was manufactured in Holland with a date code of rS1 55D. Isn't this basically the same tube as the Mullard? There seems to be a substantial difference in price between the Valvo and the Mullard/Philips NOS tubes, and would like to understand why that would be the case...
Many thanks in advance for your guidance.
Pretty much same tube. I think i see the one your looking at. Theyre all overpriced i think and should cost around the same