I don`t think so. if you call it a evaluation watch for the navy in the very early 40`s, powered with an omega mvmt., it would have been delivered to the royal navy by the contractor, the british silversmith ATO.
in this case, as with all other confirmed Longines examples, every part would have been hallmarked and numbered by the maker. because every single part was handmade, they were NOT interchangeable with other examples. we know, that they made quite a few extra cases in the early 40`s, which were sold later. most ended in smelters ( very heavy case/lots of silver...), a few ended up with a british collector, who bought my example as well. and here do the facts end. you had a nice and very rare piece of military and horological history. it was never issued into Navy service. even with the confirmed Navy examples, the Longines archives state the mil. watch, delivered to the UK. because ATO bought complete watches, took out the movements and therefore different watches come up with that movement number. common practice then. kind regards.achim