What would be some very concise Buddhist teachings and symbols that could be on (future) coinage?

Say some (silver, non-governmental) Buddhist themed coinage wanted to be made, what would be some signs/symbols (other than the Buddha in human(like) form) to include, as well as some concise and fundamental teachings? Links, especially to images, are appreciated. I was thinking: he who sees the Dhamma sees me, he who sees me sees the Dhamma; do good, don't do evil, purify the mind; and the Ashoka pillar edicts. (Also, please modify or correct any of the aforementioned as they are from memory and may be faulty and/or improved upon)