Says it all really.
Forget the rest.
These are LOKTAL 807 valves best quality ever made, and are an excellent 6L6 sub with higher anode voltage ratings.
It's half the size - compact with smaller top cap than the original 807.
Selected out pairs is possible, as I have number of these including some perfect RCA pairs of original 807 if required.
I also have the NON TOP cap version 5B255M.