These muskets were underwater for 150 years. It took 12 years to save them

When Donna Teasdale opened the lid of an old crate that had been hauled up in a fishing net, she knew she had caught a big one. Twenty big ones, in fact. It was a case of Enfield muskets from the time of the U.S. Civil War. But for anyone to appreciate the incredible find, Teasdale would have to keep them from falling apart.

https://www.cbc.ca/player/play/2263184963514

Very interesting video, imo.