The Rolex Explorer II Reference 16570 with a D-serial number (produced around 2005) represents a highly desirable "neo-vintage" transitional sweet spot for collectors. This specific configuration combines robust modern build enhancements with the classic, slim 40mm case proportions that were later retired.

  This specific iteration is widely considered by watch enthusiasts to be the ultimate daily-wear version of the 16570. It features all the crucial modern structural upgrades (SEL and the cleaner no-holes case) while retaining the traditional, easily serviceable 3185 movement before Rolex introduced the trickier 3186.

• D-Series (2005): The "D" prefix in the serial number definitively places the watch's production year in 2005. 

• Caliber 3185 Movement: This is a legendary, rock-solid automatic GMT movement featuring an independently adjustable local hour hand ("flyer GMT"). A signature characteristic of the Caliber 3185 is a slight, completely harmless visual "wobble" of the 24-hour GMT hand when you adjust the local time. 

• No-Holes Case: Rolex transitioned away from exposed lug holes (drilled lugs) around 2003. This 2005 model features smooth, solid outer case flanks, providing a cleaner, more contemporary appearance. 

• Solid End Links (SEL): The Oyster bracelet features solid metal pieces where it connects to the case. This upgrade permanently solved the common "rattle" and stretching issues associated with older hollow end links (HEL). 

• Dial Lume: A 2005 model features Super-LumiNova hour markers, which will glow bright green in the dark and will not discolor or age to a patina like older tritium variants. [

• Pre-Rehaut: Because this model houses the Caliber 3185, it lacks the "ROLEX ROLEX ROLEX" laser engraving on the inner bezel ring (rehaut), which only arrived with the Caliber 3186 movement around 2007.