When coins are struck they usually fall straight into bags and are transported to banks and shops for distribution. Even though the coins in the bags are Uncirculated they often pick up 'Bag marks' from knocking and rubbing each other in the bag. Usually larger coins tend to have more bag marks because they are heavier, hit each other with more force and have more area to be marked. Collectors will allow for bag marks but often examples that are bag mark free will be worth slightly more.
Marks on coins caused by handling, storage, and shipping in bags. Coins were frequently recounted for bank purposes and thrown around, creating bag marks, but the coin could still be defined as uncirculated.
Small nicks, scratch and marks resulting from coin movement when transported in bags.
Small scratches and nicks resulting from movement of coins in the same bag (also known as contact marks or keg marks)
Nicks and scratches resulting from contact with other coins in the same mint bag. Especially common on large, heavy coins such as Morgan Dollars.
Nicks, marks and scratches resulting from coins in a mint bag being in contact with each other.
Can be scratches or minor abrasions caused by coins knocking against each other in bags.
Bag Marks are the minor to major nicks and abrasions from coin coming in contact with other coins in the same mint bag. These are very common in large coins, such as half dollars and dollars.
Scratches or minor abrasions caused by coins knocking against each other in bags. As the Mint transports its coins in bags, it is natural for uncirculated specimens to exhibit such abrasions.
Abrasions which occur on coins that were shipped in mint bags. Most often this term applies to silver dollars, although virtually any coin can have bag marks. Bag marks in no way mean that a coin is not mint state. In fact, even a coin graded Mint State-67 or higher could have some bag marks.