It’s a F serial, puts it in 2004-2005.
there’s a “T” after “16600”
I learned something new:
“Every Rolex professional watch, not just the Sea Dweller, has a T on the case if it was once a lug through-hole model that was changed to a blind-hole case.
The T stands for Trou Borgne, french for blind hole - French is Rolex native language.
Generally you do not see the T on paperwork.”