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For sure, the article is talking about pal system, Germany or Europe never used the NTSC system except maybe for a few american channels (AFN Network). Late 60's, beginning of 70's, Europe countries were using various PAL and SECAM systems.
Only the real first color sets had a TINT control not to be confused with the american HUE control. The error in phase of the chroma signal did not change the color since it was constantly corrected by the "alternated line". Some sets had an automatic switching between B/W and colorcast that changed also the grid bias in order to have more natural colors (!!) (replacing the tint control). Back then even with the PAL system, colors were everything but natural.
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