I'd just purchased my first IWC from a 100% feedback Ebay seller and I'm hoping this is authentic as claimed. It was claimed to be in Old World Stock condition (not a scratch anywhere & includes box, paper, serial# matches warranty card, etc.). What concerns me are two unusual raised bumps on the case that appear to be the pivotal screws for both chrono buttons. Has anyone seen such bumps on the Ingenieur Chrono, or on any chrono watch for that matter? I'd really like to keep this watch as these bumps are hardly noticeable, but if they're indications of a fake, then I'll need to file a claim with PayPal. Additional photos can be provided, if needed. I would very much appreciate and value your expert opinions.