Unfortunately, the images are a bit too small and blurry to be able to read anything on the cards, but it clearly labels the device as the iPhone 5C, and shows the front face of the device, which (not surprisingly) looks just like an iPhone 5. In addition to the reference cards, the leak also shows the card for the SIM tray key.
That's about all for this round. We're just over one week away from what is expected to be the official announcement on September 10th.
source: iPhone 5S kopen