I thought the holes were intended for the classic commemorative halves and started with the cheapest: Columbus, Booker T, George Washington Carver Booker T, and I found a holed Stone Mountain for melt. I have since "upgraded" and replaced the Columbus with a holed Pilgrim I got for $15 and am waiting for my Lexington to arrive. I added a blank half dollar page to my 7070 for the modern commemoratives and duplicate of the classic halves.