I just acquired this Bulova in a non-running state. I put a new main spring in it this morning and brought it back to life. I think it is a 1956 "Minute Man" but I would like a professional opinion because it seems Bulova changed the case style on the 'Minute Man" several timesover the years. It has a 11AC 17 jewel L6 movement and a signed crown. I haven't done any cleaning on it yet. I think it is going to look real nice after I do.