Pocket Watch Markings

How much is my pocket watch?
I have a pocket watch Helvetia in my possession, passed down from my grandfather, my father for me. Research led me to believe that the marks on his back – GS / TP – means that a watch was issued in the second world war. He also "P90300" Underneath that, and a symbol that resembles a crow footprint (down). I was curious to know if someone knew its gross value and nothing else interesting about this, I can not find more information about the model or anything. I have little interest in sales, it is of great sentimental value for me, I was just curious to know more about it, because neither my father or his father are there to tell me. Any info is greatly appreciated. Ryan is probably also mention that it is in working condition, with little wear very.
You need to find a local appraiser specializes in old clocks and watches, it is clear that you have an assessment of insurance only. You might even find a local jeweler that estate jewelry purchases that could give you a free evaluation. With the economy the way it is, it is not age that is as important as the gold content. Is is 14k, 10k, gold filled, gold plated, gold or none at all. It will contribute much to its value. Is it 10 jewels, 15 jewels, 17 jewels? This will be another factor contributing to this is sentence.
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