Nice onion bottle shards! Shame they're broken, but those sure aren't easy to find whole. I've never found glass of any sort that's even close to that sort of age.
I was vacationing in Jamaica and there was an old sugar mill from the 1830s on the resort property. I also found some old looking shards near it, but nothing whole. I have a video of it on my YouTube channel: PlaneDiggerCam.