Short answer
A fake Submariner 16610 is a replica of the 40mm, aluminum-bezel Submariner Date that Rolex made from 1988 to 2010. Build quality splits them into three rough groups: cheap quartz and low-grade automatics, mid-tier Swiss-movement builds, and high-end replicas that copy the 3135 movement architecture. The 16610 is harder to fake than the ceramic 116610 that followed it. The case profile, crown guards, dial printing and cyclops are all subtle, and a weak one is obvious to anyone who has handled the real watch.
What the genuine 16610 actually is
You cannot judge a replica without a baseline, so here is the real spec.
- 40mm Oyster case, 20mm lug width, about 12.5mm thick
- Caliber 3135, 28,800 vph, quickset date, roughly 48 hours of reserve
- Unidirectional bezel with an anodized aluminum insert, 60 clicks
- Sapphire crystal with a 2.5x cyclops over the date window
- 300m water resistance and a plain, unengraved caseback
- Oyster bracelet with a flip-lock clasp on most examples
Rolex changed details during the run. Early watches came with drilled lug holes and tritium dials. Later F and D series dropped the holes and moved to Super-LumiNova. So "correct" depends on which year a replica claims to be.
Why this reference is a difficult replica
Ceramic Submariners hide sloppy work. A glossy insert and a chunky case forgive a lot. The 16610 does not. The bezel insert is thin aluminum, and its font, pip and coin edge sit close to the crystal. Crown guards on the real watch taper in a specific curve. Get that curve wrong and the whole case reads as generic. Dial text is small and thin on a 16610, so a font that runs a hair heavy shows up without magnification.
The tells that matter
Case and crown guards
Look at the guards from the side. Genuine ones flow into the case with a soft shoulder. Many replicas cut them too square or too fat, and the lugs end up thicker than the gen at the tips. Lug hole placement, on drilled examples, is another giveaway.
Dial and hands
Check the spacing of SUBMARINER against ROLEX and the crown. Check that the minute hand reaches the outer track. Check lume color. Tritium-era watches have aged to a warm cream, but plenty of replicas ship with a flat beige that looks painted on.
Bezel insert
Genuine aluminum fades and scratches in a way that is hard to fake. Rep inserts often have a pip that sits too high or a font that runs too bold. Pearl alignment at 12 is a common flaw.
Cyclops and date
Magnification should be 2.5x. Replicas frequently land closer to 2x or push past 3x. The date font matters too. A 3135 has a distinctly thin, tall numeral set.
Bracelet and end links
Solid end links should sit flush against the case with no gap. Stamped clasps feel tinny, and the flip-lock should snap with resistance. If the bracelet rattles like a can of coins on a new watch, that is a tell.
Movement and winding
Wind it slowly. A 3135 clone feels smooth and its bidirectional rotor spins quietly. A cheap 2813 feels gritty and the rotor whirs. Setting the date should snap, not mush.
Movement tiers, briefly
- DG2813 or A21J: bottom tier, low beat, rough finish, often noisy
- ETA 2824 or Sellita SW200: reliable and serviceable, but the date change and beat rate do not match a 3135
- 3135 clone: closest in feel, more expensive, harder to get serviced
What a replica will not do
Be clear on this before spending. A replica has no resale value, Rolex will not touch it, and no authorized watchmaker stocks parts for it. Water resistance is a factory claim, not a tested rating, so swimming is a risk. Customs can seize it in the US, and selling one as genuine is a crime. A 16610 replica can look right on a wrist. It cannot behave like a $9,000 watch over ten years.
Questions to ask before you buy
- Which year is this build copying, and do the dial, lume and lug configuration match that year?
- What movement is inside, and what is the beat rate?
- Is the bezel insert aluminum with a painted pip, and does it click 60 times?
- What is the actual cyclops magnification?
- Can the seller show the case profile from the side and the clasp code?
- What happens if it arrives with a crooked marker or a misaligned bezel?
Bottom line
The 16610 rewards patience. A good replica of this reference costs more than a good replica of a ceramic Sub, because the details that matter are smaller and there are more of them. Decide what you want: a watch that looks right in photos, or one that holds up under a loupe. Then check the case first, the dial second, and the movement third. Those three decide everything else.