SKU numbers on the inside didn't appear until early 2005, and these predate that by a few years. However, that painted flame pattern is suspect. Usually it's a print and you can see a slight half tone pattern. The curves follow a different path near the icon too. Here is mine:
The color of the frame should be silver, but I don't know if that had to do with the cameras white balance. I believe the hinge should look more like this, as they wouldn't leave the injection mold point so visible