The concentric marks are caused by roller damage, the mintmark anomaly is caused by a split in the plating.
Let's talk doubling Hi all. This is going to be a tutorial on the 4 main types of doubling you will encounter in your searches, and how to tell them apart. [edited - to read the entire post, follow the link that kaosleeroy108 posted in the next message. -C.]
You really should have given credit to non_cents for posting this originally. Copying and pasting someone elses post without credit is bad form.
Basically agreed. But he did provide his source, so I edited post #4 ... and to read the "Let's talk doubling" message, just follow the link that he posted in #5. Christian
This coin is dated 1994. 1989 was the last year that mintmarks were hand-punched into the die. It isn't an RPM.
since 1982 our cent coins have a zinc core with a thin copper plating. sometimes this darn zinc starts to rot and pushes the copper plating up into all kinds of different shapes.on these junky zinc cents it's hard to tell what is wrong with them because of the zinc rot problems. I saw a coin sell on ebay a few days ago that the seller claimed it to have a D in the date on it. this was only a blister in the copper plating and some poor soul paid almost 40.00 for the worthless cent. like non cents said the op's coin only has some copper plating issues which is normal on our zinc cents.
Not really once you understand how it happened. The zinc split open around the mintmark, so the shape of the zinc rot would mimic the shape of the mintmark.
