Hold the watch flat. Use a matchstick to cast a shadow on the dial. Rotate the watch until the shadow covers the hour hand. Due south is half way between the hour hand and 12:00.
It's sorta like a negative sundial...
71 posted on 11/04/2009 9:07:41 AM PST by null and void
(We are now in day 287 of our national holiday from reality. - 0bama really isn't one of US.)