Labels look worn, and they state “cosmetic imperfections” in the description. If I was a betting man... The batch of 100 NOS I got a few weeks ago had about 20% of them below minimum, which is to be expected given how long these things have sat in storage in unknown conditions. Even when they do state a batch is NOS, it’s unlikely they tested all of them, by NOS they can mean that they were from an unused batch from a stock pile, doesn’t mean they’ll necessarilly all test 100%. The low ones work in an amp, but sound rough, so anyone that hadn’t heard that type before would possibly just think they were schiit, and stay away from that type of tube. Some of them also had shorts, so without a tester, you also risk trashing your amp.