Antique Indian Head Paperweight - Another Complete Mystery!

This was another online purchase that I got for nearly free, it was so cheap. This Indian head paperweight is made of some material that I have yet to identify. It may be bronze, pewter or even lead, though it is very hard. I haven't wanted to scratch it to find out. It's obviously quite old. The only identifying mark on it is an "A" on the back. If anyone knows where this came from, please let me know!

Indian Head Paperweight, antique, front

Indian Head Paperweight, antique, back