Welcome Ramos, unfortunately Timex are not really repairable in the sense that they can be dismantled, cleaned and put back together.
They are however, tough as old boots and if not damaged by water they can usually be brought back to life by removing the hands, dial and giving them a dunking in naptha (Zippo fluid) and then oiling the pivots.
If you do this it would be great to see some pics!
Anilv