These would be displayed in large windows, so that viewers can walk around as see the reverse sides. Atop the ranks of the culled would be a single pristine and perfect example of the coin which they were not.

Such an exhibit would be most interesting if it included coins of many nations as sorted by bank robots in other countries. I imagine that among the culled would be coins of other nations - for example the Venezuelan 10 centimo piece I found among my dimes. Others would be damaged by forces unknown. Others would be noncoin impostors which were coin enough to fool someone. Some might be counterfeits. Some might actually be the coin in question, but very old and of different metallic composition (eg bronze indianhead penny) and electrical impedance.

Because these culls are actually trash, I envision posters comprised of cull coins, similar to those in the exhibits, which would be for sale as souveniers in the gallery gift shop.

Last and only marginally related (but not enough for a seperate idea) I would like an image analysis robot to look at pennies and create a display of all the different hues of oxidation, wear and abuse that these coins can acquire.