Gene - As long as THE CHIP RACK catalogs this type of error, I'll report what I have. I don't know how many chip collectors are interested in these types of differences, but I do think it's pretty easy to ignore if it doesn't interest you.

"I think you have way too much time on your hands." - Wow, I'll take that as a complement. The 2 Silver Bird chips were a gift, I've never spent any time looking for any chip variations. My total time into this thread is about 5 minutes, most of which was spent trying to get a good scan. I'm glad it looks like I spent a lot of time on it! Thank you.