meaning of 'sweep' in 'the second hand doesn't sweep'

English as a Second Language English Vocabulary, Grammar and Idioms
1

It’s from a movie:

  • One thing.
  • Your watch.
  • Is it real?
  • Oh, no. It’s a fake. I got it in Thailand.The second hand doesn’t sweep.

What does “sweep” here mean?

2

The second hand doesn’t sweep.

The second hand -the hand that shows the seconds. It goes round the dial once a minute.
So it is not working.
Sweep- not moving or going round.

3

Thank you so much!
I thought the watch was a used one(2nd hand). I misunderstood.