This is a tricky one. Correct me if I'm wrong, but I believe the transition away from "waterproof" branding was early to mid year 1969. That was the changing point to "333". I found an example of an Oceanographer "F" pictured in the 1970-LineBook_BAWD0174 with the dial marked "super waterproof". Linebooks seemed to show models available for sale in the named year, so it's entirely possible this watch is correct except for the back, and was produced as seen in 1969. The 4 earliest examples by s/n of the "D" in the database are also a 1969 and fitted with a 11BLACD movement (but display 666 Feet on the dial)
This would seem to be a potential 1969 dial with a 1970 "N0" movement, which is not out of the ordinary - housed in what is quite likely a 1969 case. Based on this hypothesis, along with all other points of reference matching; I am comfortable with
1969 Oceanogapher "D"
noting replacement back.