There was a broader use of "Sub-Sea" by Movado, simply to denote water resistance:
The "Trans-Atlantic" model line extended to the Kingmatic line as well:
The model that you have posted was probably "launched" around the time that Movado employed a promotion in which a watch was affixed to a large boat that traversed the Atlantic ocean, hence "Trans-Atlantic". So, more of a sport model with higher water resistance than other models.
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