IF we trust the NTE470 datasheet, there is no other 12 volt HF transistor they could have relabeled, that would match their stated 290 watt collector dissipation.NTE makes only three things:
A cross-reference book.
And packaging of remarked components.
This has been their business model all along. Buy parts, scrub the original markings and print a new "NTE" number on it.
They are a marketing company. They do not own a factory.