Mullard does not make tubes anymore. Electro Harmonix (EH) owned by an American makes EH, Mullard, Genelex and Tung Sol tubes in a factory in Saratov Russia. The Mullard, Genelex and Tung Sol tubes have nothing to do with the original brands other than using their names. New production tubes also come from China.
That's not to say that the EH Mullards are bad tubes, many people like them and they are much cheaper than NOS tubes. Also, all the old stock tubes would have been used up by now if there wasn't current production tubes. So give them a try, if you want, you won't be out a lot of money if you don't like them.
That's not to say that the EH Mullards are bad tubes, many people like them and they are much cheaper than NOS tubes. Also, all the old stock tubes would have been used up by now if there wasn't current production tubes. So give them a try, if you want, you won't be out a lot of money if you don't like them.