i've always wondered why copper cents have such raised rims on them. especially the 1972 cents, you can feel the rim sticking up from the rest of the coin if you run your finger across it. i've just wondered why the rim sticks out so far?
sometimes when they over pressured the presses it results in raised rims, I've seen it quite a bit on some older cents and dimes
The older coins were struck at a slower speed and higher pressure with higher relief dies which resulted in better strikes and higher rims. The higher rims were also needed to help protect the higher relief. As the relief has been lowered the striking speed has been able to be increased. But the result is much flatter coins.
I've also noticed that many 1972 (especially Philadelphia) cents stand out more than any other year of the memorials as having particularly large rims. Must have been a particular production feature that year.
Actually, they were abducted by aliens and the raised rims are the crop circles. I know, bad joke, lol. Phoenix
The 1972 lincoln cent commonly has this error. When I first started collecting I hoarded them, until I realized how many there are.
It's to do with the relief, and it is not an error, just the goverment making bankers happy by giving them stackable coins...
