Dan from Ontario thinks these speak for themselves. They were done at Memphis Underground, Chatham Ontario, Canada.
These were sent in by Justin F. he has this to say:
That was the year I was established and born. People proudly put it on their business windows and cards so I thought why not put it on my knuckles. People often think I am older and I usually have to convince them of my age. Now I just show them my knuckles.