Hmmmmmm an interesting approach to the situation. I suppose the salient variable then will be the diameter of the watch face. If the diminutive black hole is at the 12:00 position, then up to "n" times the dial radius will be the Event Horizon, "n" of course ranging from zero to 8 steradians, if we're to broach the 4th dimension and Solid Angles... after all "what happens inside the Event Horizon stays inside the Event Horizon... ....but then we get off into paradoxical information leakage and Hawking's Firewall and all bets are off. How big did you say this dial is? Please tell me it's not 37mm (shudder) Okay just to make Legend happy, here's a good reason to replace that pearl pronto: