Not convinced it would have been an easy fight. It would depend partly on what grounds the fight was being made.
If Rolex is going to argue that "milsub" applies exclusively to a military Submariner, rather then military submersible that has no grounds in my view.
If Rolex is going to say that "milsub" is a generic term, then they may have grounds to have this TM revoked, but then wouldn't have grounds for them to get their own TM.
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