A good Explorer II 216570 copy gets four things right: the 42 mm case, the fixed 24 hour bezel, the orange 24 hour hand, and a date at 3 with no magnifier over it. Where most copies still slip is the movement. On a real caliber 3187 you can jump the hour hand by itself when you cross time zones while the 24 hour hand stays put on home time. On a common replica the hour hand drags along with the minute hand, because the base is an ETA 2836 with a GMT module bolted on. Test that one behavior first. Everything else is grading.
What the real 216570 actually is
Rolex built the 42 mm Explorer II from 2011 to 2021, then replaced it with the 226570, which looks nearly identical at arm's length. The genuine watch runs a caliber 3187 with Paraflex shock absorbers, a 100 m rating, a flat sapphire crystal, and an Oyster bracelet with the Easylink extension. Dials came in black and in the white "polar" version. The 24 hour hand and the EXPLORER II text are orange on both.
Because the 216570 and 226570 share so much visual DNA, sellers mix them up, and so do buyers. When you read a listing, confirm which reference the copy is actually modeled on. Case thickness and bezel font changed slightly between the two.
Copy grades and what the labels mean
"Swiss ETA," "1:1," and "AAA" are marketing words, not standards. Nobody audits them. What they usually map to in practice:
- Swiss ETA: a Swiss 2836 base with a GMT module and an engraved rotor meant to look like a 3187.
- Asian clone: the same idea built on a Seagull or Hangzhou base, cheaper to service, louder rotor.
- 1:1 or AAA: a claim about cosmetics only, and only sometimes true.
Price tracks three things in order: the bracelet and clasp, the dial printing, and the movement. Ask what base movement is inside before you ask about anything else.
The movement question, in detail
Pull the crown to the time-setting position and turn it. On a genuine 3187 the hour hand moves alone in one-hour steps and the GMT hand stays where you left it. On a 2836 with a GMT module, the hour hand and minute hand travel together and the GMT hand is set with its own position on the crown. That single difference tells you more about the watch than any photo.
Second test: set the GMT hand to a second time zone, then reset the hour hand to local time. A true clone keeps the GMT reference intact. A module build loses it, and you have to reset both.
Case, bezel and dial
Measure the case across the bezel, not the lugs. It should read close to 42 mm. Lug width is 21 mm. The bezel is fixed steel with 24 engraved numerals, and the engraving should be crisp with sharp inner edges, not soft or shallow. Line the 24 hour hand up with the numerals on the bezel: on a weak copy the hand tip lands between marks.
On the dial, look at the spacing between the crown and the text below it, the thickness of the minute track, and the orange tone of the 24 hour hand. Cheap orange reads copper. Lume plots should sit in white gold surrounds on the black dial and black surrounds on the polar dial. The date font is another tell, and the date should sit level in the window.
Crystal, bracelet and clasp
No cyclops. If a listing photo shows a magnifier over the date, it is the wrong watch. The crystal should have anti-reflective coating underneath, so it nearly disappears at an angle instead of throwing a grey haze.
Run a fingernail along the end links where they meet the case. A gap you can catch a nail in is a gap you will see from a foot away. The Easylink fold-out should snap and lock. Check the coronet on the clasp and the stamping depth; this is where budget builds cut corners first.
Hands, lume and water resistance
The 24 hour hand should reach out to the chapter ring. Short hands are one of the most common faults. Genuine lume glows blue; many copies glow green. A seller claiming 100 m water resistance means nothing until the watch is pressure tested. Treat any copy as splash resistant until a watchmaker proves otherwise, and never swim with an untested one.
Checklist before you pay
- Confirm the reference the copy is modeled on: 216570 or 226570.
- Ask for the movement base, not the marketing name.
- Test the hour hand jump, or ask for a video of it.
- Look at bezel engraving depth and hand alignment at 12 and 6.
- Check end link fit, clasp action, and the Easylink.
- Confirm no cyclops over the date.
- Budget for a service if the movement is a modified base.
What a copy is not
It is not a Rolex, it will not be serviced by Rolex, and it carries no resale value as a genuine watch. In the US, selling counterfeit goods is illegal and importing them is prohibited, so treat a copy as a personal item you keep, not an asset you flip. If those terms do not sit right with you, the honest move is a used Seiko or a microbrand with the same 42 mm profile, and you keep a clean conscience and a warranty.