assuming that it is circulated,4-5 hundred federal reserve notes
review the redbook on manufacturing.i think it is a thin sheet of metal,probably near the end of the sheet.
with the damage on monticello i would be unsure without better photos.
cannot see it that good but look in redbook and you will see the three over the two.
maybe it is a "sandcast" from that time.
maybe a 2cent blank or lg cent blank
if the brown is not pitted from acid,then it is an incomplete coating on the planchet that hte mint missed
penny this coin is extra fine
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