[Electronic M]

The TK-40 and TK-41 cameras were designed to produce NTSC correct color and the TK-41 was in use well into the mid-60s (and probably beyond in some stations). Supposedly some stations started fudging color adjustments (I'd imagine many didn't especially stations that went color before 1957 since they already owned NTSC phosphor studio monitors and probably didn't have a newer monitor to compare against) to a compromise between NTSC and what later rare earth phosphor needed. Some color tapes from the mid-60's and older may contain correct NTSC signals... Finding them and finding copies that haven't had the color messed with could be tricky.
One likely example I can think of is the Eisenhower tape where he became the first president to be shown on color TV.

Any modern source is not going to be set up to produce correct 1954 NTSC colors... unless some special signal source with the right software to convert color spaces is built specifically for the purpose. Such a source would probably have to use a digital input to tell it which color space it's getting for input so it could process it properly.