1952 Penny At 5 Grams

In my opinion it is almost definetely man made the main signs for me were the what looks like filed rims and I don't think the wear on the rim is consistent with the wear on the rest of the coin as well as the weight but I am happy to be wrong about this one someone else should be along soon to say either way

Well that is quite interesting then. Now I am curious what has caused the damage on the reverse rim hmm.

this is the rim close up

sounds like it there is a 1922 penny the same look and I think acid on that one

very thin and very week strike
it does not have that acid feel to it still smoth to touch I have a acid one and its still rough to touch this is a acid coin beside it

Different acids and different strengths of the same acid can react differently. A vigorous reaction is likely to create a rough, uneven, highly pitted surface. A gentler digestion (in, for example, coca-cola) will create a much more even effect, generally reducing the entire surface of the coin all at once without distorting or damaging the actual design of the coin.


Because the acid attacks surface area, not volume. The acid attacks all surfaces simultaneously and at the same rate. Suppose you leave a coin for long enough in acid strong enough that 0.5mm of metal will be dissolved. That means the coin will lose 1mm of thickness (because the acid attacks both sides) and 1mm diameter (because the acid is attacking all the way around the rim). A 1mm shrinkage in thickness is much more noticeable than a 1mm shrinkage in diameter.

Leave the coin in there long enough and it will be wafer-thin, but only a couple of mm smaller than a normal coin.