Is the VS3235 a generic Dandong movement?

No. The VS3235 is a proprietary clone of Rolex's 3235 calibre, built to VSF's own specification. It shares the broad architecture of Dandong-family movements but is not the generic, widely-shared base that other factories drop into cases — that proprietary specification is the reason VSF holds its lead on the references it builds.

Is the VS3235 free-sprung?

No. The VS3235 is not free-sprung, and Dandong-family movements in general are not free-sprung. It is regulated conventionally. The claim that these movements are free-sprung is a common and incorrect repetition in older guides.

The Movement Room

VS3235 / VS3285 explained: what “proprietary Dandong-spec” actually means

By swissreptime · current as of June 2026

The verdict

The VS3235 is a proprietary clone of Rolex’s 3235, built to VSF’s own spec — not the generic Dandong base that other factories share, and not free-sprung. The VS3285 is the same story with a GMT module on top, for the GMT-Master II. The word that matters is proprietary: it is why VSF’s timekeeping holds where cheaper bases drift.

Two errors travel together through almost every movement write-up in this hobby: that the VS calibre is just a generic Dandong movement, and that it is free-sprung. Both are wrong. Here is the version that is actually true.

What it is

The VS3235 is VSF’s clone of the Rolex 3235, the modern workhorse automatic that sits inside the current Submariner, Datejust and the rest. The VS3285 is the GMT variant — the same base architecture with a true GMT complication for the 126710 and 126720 GMT-Master II. When people say “VS calibre” they usually mean one of these two.

“Proprietary Dandong-spec” — in plain terms

Most factories that build a 3235-style movement use a shared, widely-available base from the Dandong family. It is a perfectly serviceable engine, and it is everywhere, which is the point: when a base is shared, every factory using it inherits the same ceiling. VSF’s version is built to its own specification rather than pulled off that shared shelf. That is what “proprietary” means here — same broad family, different and tighter spec, not the generic part everyone else is dropping into cases.

You feel the difference in tolerances rather than features. The escapement holds rate more consistently, the date mechanism is crisper, the winding is smoother. None of that photographs. All of it is why the same factory keeps winning the verdict pieces.

The free-sprung myth, killed

Set the record straight The VS3235 is not free-sprung. Dandong-family movements are not free-sprung. A free-sprung balance regulates rate by adjusting weights on the balance wheel itself and has no regulator index; these movements use a conventional regulated balance. Somewhere a few years ago someone wrote “free-sprung” and it got copied down the chain. If a guide tells you the VS calibre is free-sprung, you have just learned something useful about that guide.

Why this matters when you buy

Because the movement is the part you cannot see in photos and cannot easily swap later, it is the part most worth getting right — and the part most guides skim because it does not make a pretty carousel. When two Subs look identical across a table, the calibre is the tiebreaker. Knowing what the VS3235 actually is, and what it is not, is how you read past a seller’s adjectives to the thing you are actually paying for.

Current as of June 2026. Movement details are checked against pieces in hand; if a fact here ages, the date is your flag.

Share your experience

Handled or own this one? Add what you found. Comments are moderated before they show.