In most instances it is rather obvious. An old coin with lots of wear and no dirt, shines like new, has been cleaned. Even some coins that appear to be not cleaned, could have been cleaned a long time ago. Although many say they can tell it is not always true. And too, it depends on the amount and type of cleaning. A long time ago many people used to spit on coins to just make them look newer. Some would spit and rub to read the dates better.
My Dad had a gas station when I was a kid. Almost all the coins around that place got full of grease, dirt, etc. and he would dunk them all in gasolene befor going home with all those.
Many people at metal demonstrations use coins for showing how their product makes a coin look new. With a this hobby of coin collecting at it's latest craze, many people are now cleaing coins to make them look new and finding methods not to easy to detect.
How to really tell may sould easy for many coins but for some, almost impossible.
My Dad had a gas station when I was a kid. Almost all the coins around that place got full of grease, dirt, etc. and he would dunk them all in gasolene befor going home with all those.
Many people at metal demonstrations use coins for showing how their product makes a coin look new. With a this hobby of coin collecting at it's latest craze, many people are now cleaing coins to make them look new and finding methods not to easy to detect.
How to really tell may sould easy for many coins but for some, almost impossible.


















