Classicwatch Vintage Watches

Hello All. New to the forum. Started collecting about a year ago. Mostly Doxa and a few others. Most not truly vintage. I have acquired a LeJour Professional Marine Dive Watch in new condition (Picture attached). I am looking for any history of the watch. I know that Royce made the exact same watch. Not sure if LeJour was a USA version? Was told that some were French Navy Issue but not sure. Any information or directions to the information would be greatly appreciated. Would also like to find the original box for this watch. Thank You.

I don't have much information, but this style case was used my many manufacturers.
I used to carry them as "Laco", supposedly made in Germany, in the early 2000s.