It is legit but it is not from the 1940s. The dial is either aftermarket or badly redone and the hands are either aftermarket or badly redone and are from another watch. It looks like a Speedking from the 1960s and yes, it has had a LOT of polishing in its life.
Model 2280. It may very well be from the late 1940s or early 50s. The bracelet is from way later on (Mid-1970s). The dial and hands are still badly re-done. Its only a 30mm watch so it will be really small compared to modern pieces.
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