7.62x39 Hungary Headstamps

I have conflicting information about the full name and address for the two codes for Hungary, 21 and 23. Can anyone provide the correct information?

Ron,
looks like everybody else is asleep, so I take duties:

21, the company name I don’t know, it had been closed after the turn and the facility was located not far from Budapest, a town called Veszprem en.wikipedia.org/wiki/Veszpr%C3%A9m

23, the company name after the turn is Matravid