White, small round; 05|52 one side and M in a square on the other side.

Found these along with the pink ones in my teenager's bedroom. The wizard isn't working for me. Again, any help appreciated.

And, just a note of sincere appreciation for all of you who help out all the time on boards like these. I'm grateful there's a place I can come get help and that there's folks out there who care enough to help -- even if it's just for "drive by" identifications for people like me.