Hey Pete,

The Dunes $1 that I have (shown below) is the light brown camel like the one on the left side in your image.

Do you have a UV light? If so, can you check both of the Dunes $1 chips you have in your image, as the one I have has an orange UV H&C (Small). The Dune $1 with the "skin" doesn't have a UV mark... This I feel add to the difference between the two chips, and indicate that they were different runs!

Regards,

Dick

P.S. Did you also note the position of the "$" on your two chips?