Thinking about the Omegas that I owned back then, I would recommend Seamaster America's Cup 2533.50. This a pic of the one I owned until it was borrowed by my older son. Even though the pic shows the watch on a rubber dive strap, there is a stainless steel bracelet in the cupboard that belongs to the watch.
Another alternative is the Seamaster GMT 2534.50 with black dial and 2538.20 with white dial.
These two pics dhould give you a feel for what Seamasters of the period looked like...
The America's Cup...
View attachment 559972
Seamaster GMT...
View attachment 559974
Hope that helps you.
Click to expand...