Here are some calculated results for a modern color test chart, based on actual measurements of RCA cameras.
In each square, the top 1/3 is what a standard NTSC receiver would produce when fed the signal from that camera. The middle 1/3 is the ideal perfect reproduction. The bottom 1/3 is what could have been achieved by employing a linear matrix in that particular camera.
The first example is the status in October 1949. This camera had an incorrect green response for NTSC phosphors. The green response peaked at too short a wavelength, so to this camera, greens looked yellowish, yellows looked orangey, and oranges looked reddish.
10_49 N by
old_tv_nut, on Flickr
The next result is from November 1949 - the green response was corrected to be closer to ideal.
11_49 N by
old_tv_nut, on Flickr
Last is the best camera measured in March 1953:
3_53 #3 N by
old_tv_nut, on Flickr