Need help identifying this square omega

Here are some pictures that might help. I have been looking everywhere but can not seem to find a watch that has the numerals like mine . It is 14k rolled gold seventeen jewels. Any help would be greatly appreciated. Thanks all and I am so happy to finally own my first omega. I hope it won't be my last.

Okay, so it is a 1942/3 Omega made for the American market. Did they have a name for this way h? I believe it is either art deco or a tank watch but is there like a series nameike sea.aster or. Constellation? Can I switch the case to a solid gold one instead of this gold filled one? If it is possible where might I go to find such a case? And as is what would this watch be worth? I was given the watch for doing some yard work fory neighbor. He did not give me a y history about it. He just handed me the watch and a $100 bill. I only raked 2 bags of leaves and swept the sidewalk so I figured I . Ade out pretty good for a. Hours worth of easy work. Thanks for the info. You are very knowledgeable.