Square-head nails were made from the late 1700s until about 1830. Most were machine-cut and finished off by a blacksmith who squared the heads. From 1830 to 1890
Pics are not so great but it looks like you have at least one rose head nail from last half 18th century and the others may be type A square nails which are early 1800s. All good artifacts...gotta clean em up to verify A from B.