Lens just came back from Canon Professional Services where it was cleaned. See attached paperwork. Lens is a USA Model. Fantastic lens. Super sharp. No sticking while zooming. Glass is clean with no internal dust. It may look like there is dust on the lens in the images, but I assure there is not. The only issue is the lens hood doesn't lock into place. Not sure if a new lens hood would solve the problem or not. Lens comes with front and rear caps, lens hood, lens pouch, original box.