I was looking at two Dimes and they appear to have the same marks on the neck but in two completely different areas, Thoughts?
The dimes do have extreme value, about 10 cents each. If you look at the edge of the dimes (or quarters, etc) you'll see the reeded edge. When you stick all these coins in a large bag, or in your pocket, they come in contact with each other in various ways and give those dots. Even squeezing them in your hand ... If people would only just stop using coins and store each one individually forever, then they wouldn't get dinged and worn like they get. We need to have coin holders for circulating coins. then they would last forever in mint state
Modern United States coins (after 1964) are now minted in automated facilities. Planchets are transported throughout the mint facility on conveyor belts to be delivered to the coining presses. After the coin is struck it falls down a chute into a large collection bin. These bins can weigh thousands of pounds and are transported within the mint facility by forklifts and cranes. The coin bins are then dumped into a machine that counts and bags the coins. The bags are approximately 4 feet on each side and weigh thousands of pounds each. They are known as "ballistic bags" and are moved throughout the facility by overhead cranes. Moving these heavy bags causes the coins to scrape and gouge the other coins during their transportation resulting in bag marks on the surface of the coin. https://www.thesprucecrafts.com/bag-marks-definition-768409
They are identical because the other Dime that hit them is curved.. So you won't get much more indentation from the other reeds. The damage has been done