far left looks like an old flat belt "pulley" that would have been on a machine of some type, the far right wooden one would have had spokes or teeth in those holes, most likely came out of a grain mill & could have had a mill stone attached or was one of the drive "gears" in the mill works (those two may be from same place>?) The middle one appears to be old car/truck wood spoke rim maybe Buick or Dodge... There SHOULD/COULD be manufacture markings on them that may help ID them
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