This is a really cool coin! I have more like it. I haven't shared any of our good ones yet because of my camera issues but that's mostly resolved now.
Improperly Mixed Alloy aka Woodie! Not to sure about the issue on the rim. Could be damage. Nice find.. Thanks for sharing!
I would say your coin was Struck on a Damaged Planchet (edge) with Lamination Error. The cool part is that it has some lamination issues on both side which is not seen as often with a Lami' error. IMO. I don't think the value would exceed $3.-$5. JMO