Help with these ???

[1stVaINF]

I went for a quick hunt this morning, just a few minutes turned up some goodies . What are these "o"s ? Found a couple feet from the bullets ?? the other stuff was all right there within a few feet. What type of bullet is that left one Type 2?? (Only a million made ?) or is that heresay?
Any help with the other stuff is greatly appreciated . Thanks y'all .

 

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[nhbenz]

I'd guess that first item is the remnants of a chimney cleanout door frame... Marked ERIE it looks like, where a lot of iron products came from.
I first thought of a wood stove door, but it seems a bit plain for that.

 

[cudamark]

The item above the bullet looks like a jean button rivet. The "O's" might be a car emblem. Any names, logos, part numbers on those? Ford, Dodge, Olds, Pontiac, etc, all made emblems like that. Looks like a clock frame in the lower left of the last photo.

 

[diggummup]

The bullet looks like a Williams cleaner, type 1.