Such "buried" pennies can have good detail, but often quite a lot of corrosion too. Your examples are VF for detail, but sadly have suffered quite a degree of damage. However, it is certainly worth checking them for rare varieties, of which there are more than a few in 1862 and 1863.
If you can find a copy of Freeman's "The Bronze Coinage of Britain" you will find all the information you need, or even more from Michael Gouby's book.