Explorer II took over from where Explorer left and then took it further. This wristwatch is one of the most sought-after Rolex models since 2011 after its production was discontinued. The Explorer II comes with a self-winding mechanical movement and features a 24-hour indicator that can be used for dual time zone. It is highly accurate, thanks to the high-precision chronometer. This wristwatch is fitted with caliber 3187. A new one will cost you $ 8,750.