@ARBIE SANTOS You keep calling discoloration/toning/plating a coating. It tends to confuse readers trying to help you. No coins are coated. You really need to do some reading and learn the numismatic terms for what you are talking about, you won't make it far with coin collecting if you can't get the basics. We can help you to try and learn but we can't understand it for you. The 2 coins you are showing are environmental damage. There are many things that can cause a coin to change color... that doesn't make it an error. The color of nickel & penny in this photo were caused by heat, not an error.
Environmental Exposure toning.. Nickels are made of Cupro-Nickel so the amount of copper it contains can tone. Not a mint error of any kind.
@ifthe Yellows are often created easier in a manilla envelope. Some of mine have turned sitting in 60 degrees temps all year long. I like that 05 Buffalo.
@Pickin and Grinin "60 degrees temps all year long" The 05 Buffalo only took about a minute & a half in a cast iron fry pan on the stove.
Before you posted these coins, did you ask yourself if they could have come from the mint like that? If your answer was, "No." Then you didn't need to post at all. On your next post(s), give us your EXACT impression of what is going on with the coin so we know what you are thinking.
It’s just damaged. Something they were exposed to made them that color. It’s known as environmental. Not worth grading. It’s only worth five cents each.
