Just contact marks. 99% of the time, an incuse mark on a coin is coin circulation damage. No premium for a damage on a coin. You might enjoy a thread I have that is a thread of threads that can be linked on various subjects with lots of images and explanations. When you see CoopHome (note it is blue?) it will take you to that area. Enjoy. Find something you really like and post a comment and it will come back up to the top, and everyone else will be able to read it again.