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OK, let me 'splain a few things.
Those aim points are not NTSC primaries, they are Rec 709 (HDTV) primaries. Since they are based on modern phosphors, most sets will be close, as yours is.
Some sulfide green phosphors (which is what this is) were more yellowish than others, expecially some that included cadmium. Yours is slightly yellower than Rec 709.
NTSC practice in cameras and receivers was essentially out of control from the time the sulfide green was adopted. Receiver manufacturers adjusted decoders to get a reasonable hue variation between red and green. Camera manufacturers also made arbitrary adjustments to get good pictures on studio monitors using the sulfide green.
This mess was never really fixed.
There are a couple of other things going on. The fix for the green phosphor in the receiver is to increase R-Y gain. This fixes the hue variation from red through yellow to green, but because the CRT is non-linear, it also over-drives bright reds, which you can see in your bar chart. Another thing is that designers, to various degrees at varioius times, deliberately made the decoder to make magenta less purple. This was to reduce variation in flesh tones, and you can get away with it because there are no natural colors in this region that viewers know is just so. Your set shows this typical sort of shift in magenta.
PAL standards were established after sulfide green was adopted, so they have had correct color all along. With HDTV, a minor variation on the sulfide green was adopted as the standard, so HDTV generally gets color correct, very similarly to PAL.
The HDTV rec. 709 primaries are also used in still photography and called sRGB. Their huge advantage is that everyone has standardized on them and if no different information is provided, you can assume that they are the intent of the source.
The major disadvantage of the yellowish green is that the gamut (triangle) excludes some cyan colors that occur fairly frequently in some bright women's clothing, and in some artwork and product packaging (and less often in nature).
The rec 709 red, which is essentially the same as NTSC red, is slightly orangy. It can reproduce car taillights, but not traffic signal red or LED red.
The blue is actually more violet than NTSC blue.
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