The Rolex Explorer II Ref. 16570 was introduced in 1989 and was the predecessor to the Rolex Explorer II ref. 16550. The Rolex Ref. 16550 and Ref. 16570 look very similar but do have some big differences. The Explorer II reference 16570, featured a newer type of movement the caliber 3185 and later the 3186 which offered the jumping hour hand. It also only had one obvious visual change from its predecessor, the use of black hour marker rings and hands on the white dial version as opposed to the previous white-dial model which had white gold hour markers and hands like the Submariner and GMT-Master. It is said that beneath the black paint of the white dial Ref. 16570, the hour markers and hands are still white gold.
The white dial and fixed stainless steel bezel are not only handsome in looks but also extremely functional. The cal. 3185 movement with its jumping hour hand and accompanying GMT hand make this an ideal piece for the frequent traveler as it's easy to set and track dual time zones. The white dial makes a statement without being overly flashy and it looks just as good on its Ref. 78790A Oyster bracelet as it does on a leather strap or nylon Nato.
Rolex 78790A Oyster Bracelet W/ 801 End Pieces
CASE & BRACELET
The wonderful case has been recently polished, retaining thick and even lugs with the presence of chamfers. The fixed stainless steel bezel has been recently polished and remains in excellent condition, showing no enamel loss. The Rolex 78790A Oyster bracelet with solid 801 end pieces shows almost no stretch and retains 12 links.
DIAL & HANDS
The white "Polar" Explorer dial is completely untouched and flawless. The tritium lume plots show no patina and remain fully intact under U.V. light inspection. The original tritium hands show no patina, matching the dial perfectly, and exhibit no degradation under U.V. light inspection.
None. The watch was just received a full service and is running at COSC spec backed by a 1-year warranty of accurate timekeeping