Hum,
perhaps you could make/print a new face for a watch that you already have.
You know Einstein was a watch maker?
But, i`m sure that in places like
Singapore, ibiza, brooklyn, or any popular (young) tourist resort, you would pick one up for a few dollars...
Perhaps if you stuck a few notices onto lampposts or in telephone kiosks then i`m sure you would get something...
Anyway, what do you need a watch for anyway?
[Are you not a time-lord?]