Welcome to the forum, please note this is not a thread for asking questions- you should create a separate thread.
that being said- Longines made millions of watches, the fact you don鈥檛 see the exact same on the internet this very minute doesn鈥檛 mean it鈥檚 valuable or rare. In fact it isn鈥檛 really; it鈥檚 a pleasing 1940s design for the American market, on the plus side the dial appears in good condition and might be original which is rare for American market Longines of that era and that type.
however the fact it鈥檚 gold filled means it鈥檚 less durable and less valuable than solid gold or steel. More pictures of the back, the sides, and the movement inside would be needed to assess its overall condition.
The value also depends on its size.
I would say at best it cannot exceed 300/350 US dollars and it might be much less, especially if damaged or not working.