I have a Longines-Wittnauer watch that i believe to be 40 years old or older it has 17 jewels on the inside where the gears are and inside the watch it says Longines-Wittnauer watch co.INC. NEW YORK GENEVA MONTREAL STAR W. C. CO. 10K. GOLD Filled 2049 and then written below that 2550645. its in very good condition and still winds up. i would like to know a little about what i have and value.