On the proper care and feeding of horn-rimmed glasses

I have a nice pair from the early 30s with a break to the frame. I have not figured out how to durably repair them yet. But they are a nice look. I also have pairs in my prescription from the 1780s, 1840s, and early 1900s. Also too many pairs of vintage sunglasses to reasonably explain. Lots of flight jackets as well. But we restore those, so I have an excuse.