While the zombie apocalypse is unlikely, and a conversation about what watch to wear for the zombie apocalypse is merely a discussion about what solar powered G-Shock you can tolerate most, a real and necessary question is: Which watch should you wear to the dentist?
Let's say you wear a gold or diamond Rolex to the dentist. Or even a regular Submariner. Or some other noticeably expensive watch. That will telegraph to your dentist that you can afford any procedure, and you might see a bill with some extra zeros.
At the other extreme, wearing a Timex might say to your dentist that he should bill you gently. But a Timex or other cheap watch could also declare, "I'm poor, so let's save a little money by cutting back on anesthesia."
My solution: Wear a classy vintage watch. A Hamilton, Bulova, Zenith, or Omega made before 1970 is the best kind of watch to wear to the dentist. Wearing a handsome vintage watch --one that you possibly could have inherited-- will signal to your dentist that you can afford novocaine, but that if he tries to bill you too much, you might become a zombie when it comes time to pay that bill.
(Disclosure: I wrote a longer article about what watch to wear to the dentist on my wristwatch blog.)