I recently bought a beautiful 1966 Constellation 168.017 Cal. 561, which I really like. I just now discovered something in the photos of the movement which is worrisome. I wanted to ask if the marks above the "Omega Watch Co." are a cause for concern. It looks to me like some kind of scraping must have taken place. Is this a cause for alarm regarding future problems with the movement? Would this be reason enough to return it? I would love to be able to keep it, but I could return it for a refund, if warranted. I was wondering if someone knowledgable here might enlighten me and let me know if the watch has a problem, or if it's not serious. Many thanks in advance for your expertise!