Not Broadstruck. The year does not matter because it is now damaged. It was a Clamshell Lamination but the piece that was attached broke off. Here is an exmple from my collection -
If you don't mind, I've got this Canada dollar, would you say is mint error or environmental damage? Thanks!
It looks as if there was a piece of tape across it once. Probably to hold it in place in an album. The adhesive toned the surface.