Finally I have something I can't ID. The fourth item was already IDed by the answer box.. I mean Dan, not Google. . It was a racer bearing for a Model T.
However, the other items. One is a small latch maybe 2-2.5" long. Two holes on each end. It was found on the old cart road leading to the driveway for the cellar. I have no clue what It'd be used for. The other side is identical, well, less the two tabs bent toward one side. No markings.
The second item is some sort of plate. Almost like a light switch plate, but the slot and the hole made like an escutcheon and 4 other holes is odd. Not as I am typing I am wondering if it could go to the dashboard of a model T. Found in the same field as the racer bearing.
The third Item is strange. The camera didn't pick it up, but it seemed like the oxidation, although random, is like lateral lines on each side. It has some copper content by the fact you can see the green color. It looks like one side had like a pin that would pivot around the center. It was in the middle of a field where I found the zippo and '39 quarter but it was also near an 1800 house.