This warrants some more peering from Herbert. It seems very convenient for Strange to have something very specific up his own sleeve for the purpose of messing with watches, so that's a possible theory, but an unlikely one. It strikes him as regrettable that he doesn't actually know very much about watches, really. That makes things difficult so far as working out the trick to this.

"I'd like to have a look at it," he says, holding out his hand. At least if he gets it out of Strange's hand he can determine whether it's related to something the man is currently holding.