Rolex Sea-Dweller 4000 World Timer but also continued growth for

but also continued growth for the Portuguese line

ensured that its production run was short

the Quartz Crisis of the late 1960s and early 1970s proved too much for Cortébert to withstand

giving it a unique character

the now-famous Calibre 11

Rolex Sea-Dweller 4000 World Timer but also continued growth forWhy We Love It Every once in awhile, a contemporary timepiece even one as rooted in history as a Rolex diving watch comes along and becomes an instant classic. The Sea Dweller Reference 116600, known to enthusiasts at the 'SD4K' did exactly that. Released in 2014 and only produced for two years, the SD4K was a return to the classic 40mm case proportions of the original Sea Dweller, that had been missing from the line since the introduction of the Deep