RWI

Guide · 10 min read

Replica Watch Movements Explained (2026): Dandong, Shanghai, Jinghe and Miyota

Brass-tone mechanical watch movement viewed through a watchmaker’s 10× loupe lens with the balance wheel sharply visible
Stewart Charette, watch industry analyst, holding a brass loupe at a watchmaker’s workbench
Stewart Charette
Updated 10 min

Replica watch movements come in three groups: clones of the genuine calibre, generic bases (Chinese copies of ETA movements and the Japanese Miyota 9015), and quartz. In 2026 most clone movements come from a few movement makers, mainly Dandong (DD) and makers in Shanghai (SH, VR and Jinghe, JH). Factories such as VSF, QF or ZF put these movements in their watches. A movement name on a listing is a sales name: the movement photo shows what you get.

The movement groups in the community guide

The r/RepTime "Who Makes the Best" spreadsheet (updated May 29, 2026) names the movement for each model row. Its names fall into these groups:

GroupWhat it isExamples from the May 2026 guide
CloneCopies the layout of the genuine calibre, so it looks right through a display back3235 clone (Submariner 126610), 4131 clone (Daytona 126500), 4302 clone (Royal Oak 15500), 324 clone (Nautilus 5711), clone 8800 (Seamaster Diver 300M), P.9010 clone (Panerai)
AsianChinese copies of ETA calibres, or other generic bases2836 Asian (cheaper Submariner versions), 2824 Asian (Tudor Pelagos), 7750 Asian (some chronographs), Asian Lemania (Speedmaster Snoopy)
MiyotaThe Japanese Miyota 9015 and its variants9015 Miyota (Royal Oak 15202 Jumbo, Patek Aquanaut 5165, most Vacheron Overseas rows)
QuartzA battery movementCartier Tank Louis, Patek Aquanaut 5067

The reptime.help copy of the community guide adds a rule of thumb for all groups: out of the box, ±30 seconds a day is "normal and acceptable" for an unserviced replica.

Who makes clone movements: DD, SH, VR, JH and VS

The prefix in a movement name usually tells you the movement maker, not the watch factory.

  • DD (Dandong). "Dandong is a movement manufacturer, not a movement itself", as a June 2026 explainer put it. Its 32xx clones include the DD3230, DD3235, DD3255 and DD3285. Its Daytona clones are the DD4130 and DD4131, and it also makes the DD4302 (Royal Oak) and the DD324 (Patek Nautilus).
  • VS. The name used on VSF watches. An October 2025 identification guide by a member who services clone movements lists the "DD3230/VS3230" and the "DD3235/VS3235" together as Dandong movements.
  • SH (Shanghai). Full 32xx designs from the Shanghai movement factory: first the SH3285, then the SH3255, SH3235 and SH3230, each in three versions.
  • VR. A hybrid series that mixes 31xx and 32xx design (VR3235, VR3230, VR3285, VR3255), according to the same guide. The same author wrote that Jinghe, a movement factory in Shanghai, makes the VR series, and that Jinghe is not the "Shanghai" factory that makes the SH movements.
  • JH (Jinghe). The newer free-sprung series from Jinghe: the JH3235, JH3285, JH4130 and JH4131. In October 2025 the same author identified a free-sprung movement sold as "SH" as a JH32xx. In February 2026 a reviewer wrote that the new free-sprung movements of UFO, QF, ER, THB and Rich are all JH movements.

Members do not agree on who makes the SH movements. In 2026 some members wrote that Jinghe is also behind SH calibres such as the SH4131, SH4401 and SH330; the guide author above treats SH and Jinghe as two factories.

How they compare. The author of a long clone-movement guide on RWI, who services these movements, wrote in October 2025 that "Dandong movements are generally of superior quality than Shanghai movements", and that both are inferior to genuine movements. The author added that Dandong movements are compatible with genuine parts, Shanghai SH movements are "somewhat compatible", and VR movements are "not compatible with any gen parts". VR and SH movements are easier to buy as replacements; Dandong movements are not, at least not cheaply. In April 2026 the same author took apart a Jinghe JH3235 and called it "as good or better compared to the Dandong 3235 in every way that I can see".

How to tell a Dandong movement from a Shanghai one

Dealers sometimes sell a Shanghai movement as a Dandong one. In September 2025 the same author wrote that the old test, the direction of the hairspring coil, was no longer reliable, because some Shanghai movements now copy Dandong details. The author's October 2025 guide uses four features from a movement photo:

  1. The size of the dot on the train bridge.
  2. The position of the pallet bridge jewel. On a Dandong, the jewel is off the line between the balance and the escape wheel, as on a genuine Rolex; on a Shanghai, it sits on that line.
  3. The coil direction of the hairspring.
  4. The position of the regulator arms.

If a listing says DD and the photo shows Shanghai features, ask the dealer before you pay.

Free-sprung clone movements

A free-sprung balance is adjusted at the balance wheel itself, not with a regulator arm. Genuine modern Rolex calibres are free-sprung; most clone movements, including the Dandong 3235 and 4131, use a regulator arm.

  • What changed in 2026. Free-sprung clones arrived from Jinghe and other makers: QF and Rich sell free-sprung Submariner, GMT-Master II and Daytona versions, ZF a free-sprung Royal Oak 15500, and ORF a free-sprung Seamaster 8800 (posts from July and September 2026).
  • What it does not mean. "A free sprung balance does not automatically make a movement more accurate," as the June 2026 explainer put it. A well regulated movement with a regulator arm can keep better time.
  • Labels to check. In September 2026 members warned that some movements sold as free-sprung have a hidden regulator. In October 2026 an owner described a VF titanium Yacht-Master movement that only looks free-sprung: the balance bridge is cut in two and the regulator arm is hidden under one half.

Labels that mislead

  • "330" on a 324 base. The May 2026 guide calls the 330 versions of the Nautilus 5711 "cosmetic only, really just the 324". The older DDF "DD330" was "a DD324 with different engravings", according to an October 2026 commenter. Only the PPF SH330 and BBF's newer DPB330 have stop seconds, according to a July 2026 commenter.
  • "8800 clone" for the Omega Seamaster. In an October 2025 service thread a commenter wrote that the VSF escapement "is not coaxial AFAIK". The genuine Omega 8800 has a Co-Axial escapement.
  • "2121 clone" on a Miyota. A 2023 owner review of the ZF Royal Oak 15202 called its movement an "Asian Clone 2121" and then described it as Miyota-based; the May 2026 guide lists it as a 9015 Miyota.
  • "Clean" and Clean Plus. In September 2026 a Clean Plus owner had a Datejust 41 serviced and found what looked like an SH3235, not the expected DD3235.

Generic bases: when they are fine

Asian and Miyota movements cost less and are easy to replace. On a watch with a closed caseback, nobody sees the movement, so a generic base can be the practical choice. The guide still lists them as first choices in many rows, for example the Tudor Pelagos with a 2824 Asian (NWBIG) and the Royal Oak 15202 Jumbo with a 9015 Miyota. The trade-offs are details that owners notice in use: the ZF 15202 owner reported a slow date change from 11 pm to midnight, which the genuine watch does not have.

Accuracy, power reserve and service

  • Accuracy. The community rule of thumb is ±30 seconds a day out of the box. A QC timegrapher for a free-sprung ZF 15500 showed +5 seconds a day in September 2026.
  • Service. Have the watch serviced by a watchmaker who knows clone movements. Spare parts for some clones, such as the VSF 8800-type movement, are hard to find, according to owners in 2026.
  • Genuine parts. Dandong clones can take many genuine Rolex parts; the same author also fitted a genuine balance to a Jinghe JH3235 in April 2026.

Genuine calibres for comparison

Use the genuine figures as a baseline, not as a promise for the clone:

Genuine calibreWatchKey data (official source)
Rolex 3235Submariner Date 126610LNParamagnetic blue Parachrom hairspring, about 70 hours, -2/+2 seconds a day after casing
Omega 8800Seamaster Diver 300MCo-Axial escapement, 55 hours, Master Chronometer
Patek Philippe 26-330 S CNautilus 5811/1GSelf-winding, sweep seconds, date at 3 o'clock, stop-seconds
ETA 2824-2Swiss base calibre28,800 vibrations per hour, 25 jewels, typical 42 hours

Sources

All dates are the posting dates of the threads. Several of these guide posts were first published on the RWI forum.

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