@Jason Hoffpauir It is called a test cut. It was done by bankers in antiquity to make sure the coins were pure silver. Very common among this type of coin. They did it on the reverse as to not anger or displease the goddess Athena. The first coins 1-9 or so have examples with no test cut. Examples with no test cut are usually a bit more expensive than those with test cuts.
Listen I like Owl1, Owl17, Owl5, and Owl11. Please let me know the prices on these. I will be going out of the country soon (wife's brother's wedding) and will be gone for a month). Thanks. MJH
Ok. I'm sure one of them will still be available when you get back. Owl17-$575 Owl11-$550 Owl5-$600 Owl1-$725