ARF Rolex DateJust 31 Ref. 278288RBR
ARF establishes the benchmark for mid-size Datejust replicas through superior case geometry and a dedicated 2236 clone caliber.
Powered by Clone 2236 Movement
The ARF 2236 caliber represents a significant step up from standard 2824 adaptations previously seen in 31mm models. By utilizing a custom mainplate, the date wheel sits at the correct depth beneath the Cyclops lens, eliminating the sunken date flaw common in earlier iterations. The bidirectional winding mechanism is efficient, and the balance wheel operates at the correct 28,800 vph frequency. Furthermore, all units undergo our strict QC standards prior to dispatch to ensure optimal amplitude and beat error.
⏱ Accuracy Profile:
The Clone 2236 movement is generally regulated to ±8–12 seconds per day, delivering reliable daily timekeeping consistent with high-tier replica calibers.
- ✅ Power Reserve: Approximately 36 hours
- ✅ Complications: Centre hour, minute and seconds hands; instantaneous date with rapid setting; stop-seconds
- ✅ Winding Direction: Bidirectional
Technical Specifications
THE BUILD18k Gold Plated Oystersteel
Measuring 31mm in diameter and an exact 10.4mm in thickness, the monobloc middle case features a highly polished finish replicating the factory profile.
THE DIALOlive Green Finish
Displays an accurate sunray finish with sharp, raised text printing. The hands are treated with Chromalight-style lume for consistent low-light visibility.
THE BEZELDiamond-Set Style
Features synthetic stones set with precise alignment, mimicking the factory ‘rbr’ specification with tight tolerances and excellent light refraction.
THE BRACELETPresident Bracelet
Three-piece solid links with 18k gold plating, featuring a concealed folding Crownclasp with impressively tight endplay tolerances.
Why ARF for This Reference?
Many collectors ask: “Why not GMF or BPF?”
The ARF version excels specifically in bracelet density and case geometry. At 79.6 grams, the ARF President bracelet feels substantially less hollow than the GMF counterpart. Furthermore, ARF’s 10.4mm case thickness is noticeably closer to genuine specifications than BPF’s historically thicker 31mm profile, allowing it to sit flush against the wrist.
Full Disclosure: The 18k yellow gold plating tone, while rich, may present slightly warmer under harsh fluorescent lighting compared to solid factory gold, and the movement rotor can be faintly audible in completely quiet environments.
Data Sheet
| MODEL REFERENCE |
m278288rbr-0007 |
| FACTORY / VERSION |
ARF Edition |
| MOVEMENT |
Clone 2236 |
| CASE MATERIAL |
18k Gold Plated Oystersteel |
| WEIGHT & THICKNESS |
79.6g | 10.4mm |
| CRYSTAL & LUME |
Sapphire with Cyclops | Chromalight |
| DIMENSIONS |
31mm × 37mm × 10.4mmManual measurements — minor tolerances apply. |
| WATER RESISTANCE |
50 Meters — professional pressure test recommended before swimming |
Collector Q&A
Q: Does the ARF DateJust 31mm use a decorated ETA or a true clone movement?
A: The ARF 278288RBR utilizes a Clone 2236 movement. Unlike a decorated ETA 2824, this caliber is engineered to replicate the genuine Rolex 2236 architecture, ensuring correct crown height and proper date wheel depth beneath the Cyclops lens.
Q: How does the weight of the ARF 31mm compare to the genuine solid gold model?
A: This ARF replica weighs exactly 79.6 grams. While this gives it a substantial, premium feel on the wrist, it is significantly lighter than the genuine solid 18k gold piece, which weighs notably more due to the density of actual gold compared to the gold-plated Oystersteel core used here.
Q: Will the gold plating on the President bracelet fade with daily wear?
A: The ARF factory uses a robust PVD plating process for their 18k yellow gold finish. While highly durable under normal conditions, aggressive friction, heavy perspiration, or exposure to harsh chemicals will eventually cause wear, particularly on the clasp and inner bracelet links.
Q: Is the rotor noise noticeable on the Clone 2236 movement?
A: Yes, a known quirk of the Clone 2236 caliber in this ARF model is that the bidirectional winding rotor can be faintly audible in quiet environments. This is a common characteristic of mid-size clone movements and is completely normal for its operation.
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