Timex, fortunately, is one of the few makers which left a code allowing identification of the watch.

See picture below. Timex had a code. The code is printed on dial in very small numbers above six o' clock. The last two numbers (all the way on the right) correspond to the year, 65 is made in 1965, etc. The next two (or sometimes three) numbers, moving leftward, are the movement number. The first four numbers are the catalog/model number.