I just wanted to share what I found mixed in with a bunch of blank prototype boards. It's not the Disk II IWM card. At least not the one I have seen a photo of. This does almost look like a mirror image of that card. It says "AIIE Controller" deosn't have a part number, so I am guessing this was some kind of prototype card that never was. I have a collection of blank PCBs from Apple, but not one like this until now.
If anyone here on AF has any more info about it, let me know. I am going to post it on facebook too.
I included the IWM Disk II controller pic from APPLE2.ORG for reference.