Gotta love in the demo vid when Josh has the time go from 3:15 to 12:20 with just a couple of turns of the dial.
Yeah that's why I get within an hour of the time they choose.
Subtlety for you guys: When you start spinning the dial, ask someone if they have a watch or cell phone, so you can set the correct time again at the end of the trick.
"I'm really screwing up my watch here. Sarah, you have a cellphone or something so I can reset the correct time when we're done?"
I'm using the theme of missing time:
Have you ever had an experience of missing time? Like when you're driving home from work, and arrive at home but don't remember any of the red lights or traffic. I'm going to show you how that works! We'll pull out the pin and change the time on this watch... (insert rest of trick here)
Then finally the hands disappear - demonstrating missing time.