Hi My Fellow TH'ers
Great finds you have there! I really like your canteen caps. We find those from time to time here in Virginia. The trouser 4-hole buttons are so nice when you find them not all rusted up. That piece of lead at the top next to the canteen caps appears to be a lead pencil used to write home from the field. Those are great finds and most TH'ers have no idea what they are when they find them so either toss them away or put them into a unknown pile.
Best of luck with the search site, I would clear out every signal I could then go over it again and again. Dig up every signal you get and keep searching it.
Best of luck
Dave
'Digger-Dave'
THing4CSA
PS: Remember; Don't leave it in the ground!