I do not know the year but I do remember my father wearing this in the 80's. I took to the watch store today for a cleaning so I can hand it down to my son. They said it was likely a knock off. I didn't ask further questions and they would not open the back of it. Under Bulova on the face it does say ACCURATE not Acutron and I have not been able to pull up any Bulova ACCURATE watches. Is it likely a knock off?