I think your lead lollipop is a saboted bullet. Hornady makes a bullet that is on the end of a plastic disc like that. The powder charge is a small bore size pellet with a hole in the middle that fits over the shank end of the lollipop! I shoot them in my muzzle loader. Monty
The lead lollie pop is a BRENEKE Rottweiler shotgun slug . A large thick felt washer fits over the plastic stick type thing . I think they are German manufacture .
The other thingy looks to be a strap end fastener for a kids jump suit or bib overalls . They just crimp onto the end of the cloth strap instead of threading through .
Looks like the legband from a duck,goose or swan...have seen alot of tags like that here that the DNR puts on the birds.....Thats an old one...find any bones with it