I have spent the last 5 years sorting through 41 large boxes that contained a total of about 100,000 loose unboxed tubes. I didn't count them all, just one box. I sorted each box by size, tossing all the broken ones. Then by number of pins, then unique features, and so on until they were mostly all sorted.
I found a few that looked like yours and they were all 6360's. The square cutouts on the beam plates were the unique feature that I sorted by. There could be some other tubes that have this feature, but they weren't in my collection.