Genuine CORUM products are sold through authorized dealers and are not available on the internet. By purchasing a watch from an unauthorized dealer you may risk possessing a watch that is of doubtful origin, counterfeit or second hand. CORUM’s international warranty is only valid if the CORUM timepiece has been purchased from an authorized CORUM dealer. You must present the warranty card, properly filled out and dated by the authorized CORUM dealer, to obtain service under this warranty.