Sea king AK?, looks to be very similar to ncmounties except it has a raised Bulova sign, different style back, dial is a pearlescent pinky colour and markers are very slightly different. (did I say similar?! ) so doesn't quite match the line book example . Also, case is marked on the inside M8 yet movement is N0. which is keeping excellent time. Lume is really good.
Based on the 1970 Line book BAWD0173 this is listed in the Sea King section model #13425-4Y. Reviewing the other 1970 line book it is listed in the index but the page is missing from our file. Based on this I am confident this is a Sea King unknown variant for now.
1968 Bulova Sea King
Thanks for pondering over this one still! . Am I right in thinking this style of case back is common on watches intended for the European market as I have noticed a number on Ebay here in the UK with that style . Also wonder whether they were assembled here and that some of the watch names were not considered appropriate for the UK market (especially President and Senator !) and were left unnamed . Just a thought.