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No PC board part numbers silk screened on the printed circuit boards? That would have been my hope of identifying the ancestry of the design. It smells like a low-volume training school kit, but I wouldn't have guessed they would go so far to make an unlabeled knock off of a commercial color chassis, and even less that they would design one themselves. That's a huge job.
One correspondence school (the name will come to me) used an unbranded (at least in their magazine ads) Heathkit, and I think later an unbranded Zenith/Heathkit that was less soldering and more snap-together.
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