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There is some good information about "Simplified Mexican Color TV" in a two page article with drawings and a partial TV set schematic by Associate Editor Leslie Soloman, published in Electronics World, July, 1964, pages 48 and 71.
The article describes the color system being broadcast by XHGC-TV, Mexico City, using a two color disk spinning synchronously on each monochrome camera to make 60 interlaced fields, 30 orange and 30 cyan.
The partial TV schematic indicates the set was an NTSC color set [NTSC color circuitry not in use for this system] with a standard 3 gun CRT, but with an added electronic switch to select which color was being scanned onto the CRT. The swtch turned on either the 'red' gun or the 'blue and green' guns together at the field rate to make a color picture.
I have the original article and will scan it and make a .pdf to post if anyone is interested.
Cliff
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