Start here: the "40" is a case size, not a model
When people search for a fake Rolex Submariner 40, they are almost always looking for a replica of the 40mm Submariner case. Rolex built the Submariner at 40mm for decades and moved the line to a 41mm case in 2020. So a "Sub 40" replica points at discontinued references like the 14060M, 16610, 114060 and 116610, not at anything you can walk into an authorized dealer and buy new. That single fact explains most of the confusion around these watches. The 40mm shape is what collectors know, and it is the shape the better replica factories have spent years copying.
Which references actually get copied
The replica market concentrates on a handful of 40mm Submariners. Knowing the reference number matters because the case shape, bezel material and dial layout differ between them.
- 14060 and 14060M - no date window, aluminum bezel insert, thin lugs. The classic tool-watch look.
- 16610 and 16610LV - date with cyclops, aluminum bezel, drilled lug holes on early examples. The "Kermit" green bezel version lives here.
- 114060 - no date, ceramic bezel insert, thicker maxi case. Very popular as a replica because the dial is simple.
- 116610LN and 116610LV - date, ceramic insert, maxi case and hands. The "Hulk" green dial sits in this group.
A seller who lists a watch as a Submariner 40 without a reference number is telling you something. Real builders name the reference because the details change with it.
Movement tiers, and why they drive the price
The movement is the single biggest variable in a replica. I sort them into three rough buckets.
Entry level
Chinese 2813 automatic movements. Cheap, loud rotor, and the date flips slowly instead of snapping. Fine for a display piece, not for daily wear.
Mid tier
ETA 2824-2 clones and equivalents. The genuine ETA 2824-2 is a 25-jewel automatic with about a 38-hour power reserve, and the copies aim at that spec. These hack, wind smoothly and can be serviced by an independent watchmaker.
Top tier
Clone 3135 and 3235 movements built to look like the Rolex architecture. Correct beat rate, correct hand stack, decorated plates. A watchmaker can regulate one, but parts availability is the weak point. A watchmaker can regulate one, but parts availability is the weak point. Nobody stocks spares.
Details that separate a good replica from a bad one
Photos hide a lot. In daylight, the case and bezel do the talking.
- Bezel insert: ceramic should have crisp, deep-filled numerals. Aluminum should look matte and slightly grained, not painted.
- Crown guards: they should be cut, not blobby. Uneven guards are the fastest tell on a cheap case.
- Cyclops: the date should magnify cleanly with no blue haze, and the date font should sit centered.
- Rehaut engraving: the inner ring text should be shallow and aligned, not laser black.
- Bracelet fit: solid end links should sit flush against the case with no gap or step.
- Lume: a quick charge under a lamp should glow evenly across all markers, including the pip on the bezel.
How I check one in the hand
- Set the time and feel the crown. Gritty or wobbly winding is a bad sign.
- Check the date flip near midnight. A slow crawl points at a low-tier movement.
- Turn the watch over. Look at the caseback thickness and whether the engraving lines up.
- Weigh it. A 40mm steel Submariner on a full bracelet should feel substantial, not tinny.
- Test the bezel. It should click through 120 positions with no back-play.
- Sight down the case flanks. Lugs should taper, not bulge outward.
Water resistance and servicing
Do not swim in a replica unless a watchmaker has pressure-tested it. A factory gasket is not a promise. Water resistance is defined by ISO 22810, which sets out the requirements and test methods for watches marketed as water resistant, and most reps have never been near that test. If you plan to keep the watch, budget for a service. A movement clean and re-gasket every few years keeps it running and gives you a real answer on sealing.
Buying traps to avoid
The two most common problems are misrepresentation and paperwork theater. Selling a replica as a genuine Rolex is trafficking in counterfeit goods, which is illegal in the United States and grounds for seizure and prosecution. If a listing says "genuine" and the price is four figures, walk away. Boxes and papers are printed by the same people who make the watch, so they prove nothing. Ask instead for movement photos, timing machine readings, and a real pressure test result.
The short version
A fake Rolex Submariner 40 is a replica of a discontinued 40mm case, and quality tracks almost entirely to the movement and the case finishing. Name the reference, ask about the movement, inspect the bezel and crown guards, and treat water resistance as a claim to verify. Buy the watch for what it is, not for what a seller says it is, and the whole thing gets much simpler.