If you're ever buying a Nikon camera or lens and the seller tells you they purchased it brand new, there's a very easy way to see at a glance whether it was actually factory refurbished. Simply glance at the serial number and look for a "secret code."
Olympus Russia had recently posted a photograph showing the above image, which showcases a secret data screen on one of their OM-D cameras. In fact, there are three pages of data screens that provide information from how many times the camera’s shutter has been released, to how many times the flash has been fired, and much more. Olympus has since taken down the image, but the secret access code has now been outed.