When we talk of transitional models or rarer models within the same model, this is it. This 16570 dated 2011 is box papers and card. The watch is unpolished with signs of wear but nothing major except a ding on the opposite side of the crown. The watch is bearing the 2186 updated movement, solid end links bracelet, random serial and all the bells and whistles of a transitional 16570. This might be hard to explain why this is making the model rarer or more expensive but a little time spend reading about it will make you understand why these will be one of the nicer, desirable models in the next decade.  
 
Details:
 
Brand: Rolex
Model: Explorer II
Reference: 16570
Year: 2011 Random Serial Number
Material: Stainless Steel
Dimensions:  40mm
Crystal:  Sapphire Crystal
Movement: Automatic Cal 3186
Bracelet/Strap: Original Bracelet Clasp Code LT7 (2009) 
Box/Papers: Yes/Yes (Card dated 2011)