Great point, Rob... I forgot those prototypes. I have the Braves, which is different from traditional Stanford Pottery in a number of ways...
1. Slightly smaller
2. Chalk composition instead of Ceramic
3. Not as glossy
4. No coin slot in back
Or is it a razor slot? (I have heard opinions both ways)
I have also heard that these may have been Salesmen Samples?
Here's a pic of mine.... hope others will post/add to this thread as well