It will become apparent to you that this category is one of my favorites. It’s a combination of history, culture, technologies and inventions of the past, and some math and science thrown in for good measure. My wonderful wife is very patient with my appetite for collecting obscure and sometimes bizarre things.
That’s about all I can say, since this section goes off in many different directions with little in the way of a common “collecting” thread. Perhaps you’ll find something that interests you as well.
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