I took a plain 'ol '64 ken half. Using the back of a spoon, tapped the coin continuously as I held coin between thumb and finger, rotating coin. Wow that got boring! So, I started tapping when I got a little bored...tap, tap, tap. Soon, the the edge of the coin starts to flatten a bit.
Got a little impatient after a few hours of tapping here and there, so I started to use a very small hammer. Things started picking up from there...after awhile the edge flattened enough so that I could drill out the center very carefully. That's as far as I got, threw it in a drawer.
The coin in the photo is made using a different method. My wife bought me one like it off ebay. ffd