>Seal of Solomon
Yeah yeah, bullshit. There are both low and high magic books attributed. The hexagram does appear once or twice, but seriously, start here: https://www.sacred-texts.com/grim/kos/kos25.htm page through and tell me half of these dont look like magnetron designs.
The decoder ring page also looks like circuit diagramming stuff: https://www.sacred-texts.com/grim/kos/kos61.htm
There are, if i am not mistaken, ray-guns, EM shielding, propulsion, and many other circuit diagrams in books an d books like it. We have no idea what the components were, ex: whats the sign for transistor? But there are a lot of numerical notations.
Now, say somebody had a-teams of engineers going over this book for a hundred years? And a few S-rank? Maybe we almost had "UFOs" figured out by the time a couple crashed and gave a few more hints.
"Seal of Solomon" is a red-herring newspeak thing invented a long time ago to make people think of something else besides an ancient tech-manual.