Face View: Later design on the left and early design on the right

     
This is a shot of both board versions with the LCD alongside.
The KM7, KM8, KM9a Small chip model is on the left, the KM9 Large chip Model is on the right.

      
This shows the top connector pin alignment for both versions of reader boards.

      
This shows the bottom connector pin alignment. KM7, KM8, KM9a Small chip model

      
This shows the bottom connector pin alignment. KM9 Large chip model

  
This is the USB Connector end with the boards mated.