Hello, i have a pocket watch given to me when my grandad passed away. its a zenith 14k gold and numbers inside the back are,480563, and numbers on the gears is 2452105. also says its 15 jewels and 3 adj. i am more interested in what year this watch was produced, and a possible range of what it might be worth. My grandad used to repair watches and all the kids and grand kids got working watches when he died. Any info will be greatly appreciated.... let me know if there is anyother info i can give.