Machine, I've never even heard of a CWR around here. Policy is to have everything dumped into the machine and the sheep follow.
On a side note, I've gone through several hundred boxes of dimes, I have not even counted. But I go through 5 a week at a minimum, and I've only found those.
I found an 1868 nickel composition trime a few weeks ago in a dime bag. Pretty banged up but cool.