It's also what staed on the reciept. (NOS for me is New Old Stock).
Some weeks ago i had the opportunity to measure them with a tube tracer, and they were far from new. They were in fact at the very limit of useless.
I can veryfy this with comparative measurment ( actual tube curves ) of real 7199 that i bought as new several years ago. They fit the original sylvania tube curves very well, the ones from mullardmagic does not.
I have written to them from two different mailaddresses and got no answer whatsoever. So either they are dead or they don't care.
Be aware !