Hobo Nickels

Hobo nickels, carved by yesterday's homeless, were traded for meals, a place to sleep, a ride, or other favors. Some were carved with images of loved ones as mementos of better times, or to honor those lost to time.
The Hobo Nickel Society has the history and tons of pictures and links.
Some of the nickels done in the last 10 years or so were done by professional engravers, as a hobby. Those, of course, are incredible but the early ones, although somewhat crude, are pretty impressive considering they were working with tools like a jack knife and bits of broken glass. Showcase of mostly modern ones.