Follow along with the video below to see how to install our site as a web app on your home screen.
Note: this_feature_currently_requires_accessing_site_using_safari
That image doesn't really have the right angle to be able to tell properly. But I don't see anything that looks fake. Photos of the ends of the earstems, the hinge screws, and the serial on the inside of the nosebridge would help.
Check out this thread. It doesn't address the R1 specifically but some of the tells apply to fake R1s:
http://www.oakleyforum.com/threads/oakley-x-metal-authenticity-checklist.23622/#post-270499