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Having a number of components connected but not yet soldered would be typical of Heathkit instructions, which carefully got everything connected to a particular terminal before saying to solder it. Lower quality kits would often leave it to the builder, resulting in problems if he decided to solder before the last part was in place.
Some of those training programs used kits supplied by Heath. I don't recognize this chassis, but that doesn't mean much, since I am not familiar with their tube sets.
I have to say the wire dressing looks to me like someone carefully following Heathkit instructions.
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