As with any internet photo or rumor, it’s impossible for us to confirm the validity of this photo.
According to rumors, these are the boxes that the low-cost handset will ship in. Notice that they are plastic, and tehy read iPhone 5C. Again, we can’t be sure that this is even real. While there is definitely something in production there, we don’t know if this is just some knock-off device made in China, or an actual Apple product package.
If it is a real device, it’s not clear what the C stands for.