If you’re hunting for a Day-Date with the right heart, this is the movement to know.
VS Factory’s Dandong-made 3255 replica is a true integrated design (3235 bloodline + week/date module), not a 3135 patchwork. That difference is why VS runs reliably for years while “Shanghai 3135-based 3255” copies fail far more often.
Why “true integrated” matters
Most of the market’s so-called “3255” movements are actually old 3135 architectures with added parts. They can look similar from a distance, but inside they’re a mix-and-match of components that don’t share the 3235/3255 geometry. VS spent 3 years developing a one-piece, 1:1 integrated train and calendar—so the layout, gear shapes, and service logic mirror the genuine 3255.
Quick comparison: GEN vs VS (real) vs SH (fake 3255)
What the circled red markers show
(Five-point checklist on three movements: GEN / VS 3235 bloodline / Market 3135 bloodline)
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Parts 1:1 – VS follows genuine process sizes so (mostly) interchangeable.
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Rotor bearing – 27 balls on GEN & VS vs 7-stud on faux 3255.
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Winding axle shape – cylindrical (GEN/VS) vs screw-shaped (3135).
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Under day disc – no ruby on GEN/VS; ruby on 3135-based builds.
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Keyless & calendar train – VS mirrors GEN (correct cams/gears & protection bridge height), not the 3135 layout.
Reliability & service
VS’s true integrated design is notably stable with near-zero return rate in factory data. The 3135-based “fake 3255” tends to suffer higher failure rates because mismatched parts create extra friction and tolerance stack-ups. For owners and modders, VS’s 1:1 geometry means cleaner assembly and easier parts sourcing.
Detailed Specifications
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Movement type: VS Dandong 3255 replica, true integrated 3235-line movement with Day-Date module
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Power reserve: ≈72 hours
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Rotor system: Full 27-ball bearing rotor (GEN-style)
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Keyless works: GEN-spec setting lever & yoke architecture
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Calendar system: GEN-style four-gear quickset, correct date-change geometry
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Day disc under-structure: No ruby jewel (GEN-correct)
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Winding axle form: Cylindrical/flat-pillar (not screw-profile)
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Parts compatibility: Most components dimensionally interchangeable with genuine 3255
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Lineage: 3235 bloodline + week part (not 3135-based)
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Stability: Factory notes emphasize very low return rate vs 3135-hybrids
Buyer’s checklist (spot the real VS 3255 replica)
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Look for the 27-ball rotor and cylindrical winding axle.
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Lift the day disk: GEN/VS shows no ruby there; a ruby points to 3135 lineage.
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Inspect the keyless area: VS copies GEN shapes & springs; 3135 versions don’t match.
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Confirm 72-hour PR and 1:1 component geometry.
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Avoid sellers marketing “3255” that’s actually 3135-base with add-ons.
Final word
If you want a Day-Date that feels and services like the real thing, the VS Dandong 3255 (replica) is the only movement in this class with a true integrated design and GEN-style engineering. The market’s 3135-based “3255” copies may mimic the look, but they can’t match the architecture—or the reliability.