Sovtek production and referred to as 6H30PI, 6H30Pi or 6H30N-EB with the large ring halo getter. Stipulation is provenance, NOS new in box and no damage to the base, so specifically no cracks or the glass chipped at the point where the pins exit the tube.
Here is my flickr pic of the exact tube type I am looking for (my example was made circa 2001), with the large ring getter and if you inspect them carefully that getter has 3 support posts:
https://www.flickr.com/photos/933865...n/photostream/
And for comparison a pic of the newer production tube types, evident by the very different and much smaller ring getter type which I am not interested in:
https://www.flickr.com/photos/933865...n/photostream/
Thanks in advance.