Can anyone identify the set in this link? https://bit.ly/3a2MDrM I don't think I've ever seen this before.

Olympic.

http://www.earlytelevision.org/olympic_duplicator.html

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Yes, it's definitely an Olympic Duplicator RTU-3. They were also installed in NY's New Yorker and Stevens hotels. All the ads for them that I've seen show slightly different cabinets.