
http://www.maritime-executive.com/article/1800s-anchor-recovered-from-delaware-river
We use moorings in our work, and our standard moorings are based on 10-12T surplus ship anchors. So this old piece is almost as large! I'd hate to sweat that thing up with a manual windlass - maybe by the time this anchor was put into use, steam was available for jobs like that.
Below, see another picture showing the chain, clearly marked. Wonder what they'll do with it?

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