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For example, here are a couple of (sorry not silver) coins I have from the early 1800s,
I wonder how they eventually found their way into my pocket?
I don't even know where they are from, or what they are made of...

I think they are from Portugal though I couldn't identify them specifically. Here's one that's close: https://en.numista.com/catalogue/pieces11582.html

Thanks, that looks like a match for the second one. And thank you for that website, it's a good resource.

I should have included something for scale. These two coins are just about the same size as a silver 1oz Canadian Maple leaf .

I know! I have a bunch of old European copper or bronze stuff from the 1800s that's just really cool to look at, and imagine what history (and pockets), these coins have gone through.