I just came across a vintage bulova accutron astronaut and I was wondering if anyone could help me with it. It has a spiedel band which I believe it is original The back is stamped m3 but inside it is stamped m3 and m2 lightly. It runs great also. Case number 214HN. Also it is not my style so what would be a good value on it? Probably trade it for something different. Thanks everyone in advance!