Oddly it looks like most of the other anchors recovered locally from civil war era boats.
The Navy stockless was pretty much standard after 1900 ish, example is from the mighty Missouri.
I don't mean to imply that there are hard and fast rules, people used what was available and didn't purchase new ground tackle just to stay with the latest trend.
I'm aware of cannons being marked; other than a broad arrow or something, I wasn't aware of anchors having inscriptions. I'd like to learn more.