1970 Bulova Sea King, unknown variant
Case and back are stainless steel dated N0 (1970), Japan made (stamped on inside caseback and inside case) with inside caseback # of J-A2345; no letter in front of s/n. 17 Jewel manual-winding gold color Swiss made 11BLC movement dated N0. Dial is white, whale symbol (prior years some of these had Sea King on dial, ref 1969 model), luminous hands and markers.
Looks to be very similar to the early 60s variant 'A' - 1961 ad; no other ads found closer to watch date.