Villagenut is correct. If they are center fire, they are modern. If they are rimfire, they may go back as far as the Civil War. Try to get a set of micrometers on them to get the caliber if you can.
Hey, I feel your excitement, however we can't really help you, without some data.
1st BRUSH your headstamps with brass bristle brush slightly, enough to get lettering and number of the caliber.
Is the primer brass or copper?
Is there an extractor notch at the base of the head....?
Anything will help us....!
Thanks!