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As Dave A said, that device looks like a variation on the ones that Panasonic made in the late 1980s or early 1990s, such as the WJ-MX10 and others; basic video effects generators with some ability to do A/B wipes and audio mixing of a couple of signal sources. I use one in my ham radio "amateur television" (ATV) station here, for fun. No, they would not do anything related to zooming or changing the aspect ratio of video signals.
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Chris
Quote from another forum: "(Antique TV collecting) always seemed to me to be a fringe hobby that only weirdos did."
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