As an example of the Swordfish Booster collection, there are few models more unique than the Iris. It carries a bit of a premium price over its siblings due to the case. My understanding is that producing the iridescent case is less than a perfect science. That means many cases come out of the process with uneven colors and a blotchy look. The unpredictable and less than industrial technique adds time to the production of these watches and rarity to their availability. No doubt enough watch lovers will find that valuable. Graham's price is $17,500 for this reference 2SWBB.B39L Graham Swordfish Booster Iris watch.