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I believe those telecines at the time probably used vidicons -
can you say "lag"?
can you say "shading"?
- also quite possibly no matrix between the R,G, and B;
but then again, NBC may have used a "masking" unit (essentially an adjustable color correction matrix) which would improve the color saturation, especially the greens, which are weak in a straight vidicon camera due to effects of the built-in vidicon gamma curve, Actually all colors could be improved to undo most of the reduced saturation in the film. Such a circuit would amplify noise too much to use with live-pickup image orthicon cameras, but could be used with the vidicons when they were getting lots of light.
Attached is Figure 9-44 from Color Televison Standards N.T.S.C, Donald G. Fink, consulting Editor, McGraw-Hill, 1955. It shows the original scene color, the reproduced color (effects of film and telecine), and the reproduced color with masking. This early masking experiment introduced some errors of its own, but you can see that it generally acted to improve color saturation.
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