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Description
ARF Rolex Datejust 31 Ref. 278383RBR Olive Green Diamond
ARF establishes the definitive benchmark for mid-size Datejust replicas by achieving an exact 10.4mm case thickness and superior Jubilee bracelet articulation.
Powered by Clone 2236 Caliber
The mechanical foundation of this piece is the Clone 2236 automatic movement, specifically adapted for the 31mm case architecture. While it utilizes a standard regulator index rather than the Syloxi hairspring found in the authentic caliber, the movement is rigorously tested to meet for amplitude and beat error. The winding mechanism engages smoothly, and the date complication snaps instantaneously at midnight, reflecting the rapid-setting functionality expected from a modern Datejust.
Rated at 卤8��12 seconds per day for this specific Clone 2236 caliber, measured across multiple positions.
- �� Power Reserve: Approximately 36 hours
- �� Complications: Centre hour, minute, seconds; instantaneous date with rapid setting
- �� Winding Direction: Bidirectional
Technical Specifications
Precisely machined to a 31mm diameter and 10.4mm thickness, featuring a monobloc middle case with a screw-down case back and correct winding crown dimensions.
Exhibits a highly accurate radial brushed finish. The diamond-set Roman numeral VI is cleanly applied, and the date aperture aligns perfectly beneath the 2.5x Cyclops.
Fixed bezel featuring simulated diamonds set into 18k yellow gold plated steel, carefully proportioned to match the gem diameter of the authentic piece.
Five-piece links with tight tolerances to minimize endplay. The folding Oysterclasp operates with a secure, tactile snap identical to the genuine mechanism.
Why ARF for This Reference?
Many collectors ask: ��Why not GMF?��
While GMF produces a highly capable Datejust 31, ARF holds a distinct advantage in structural refinement. The ARF case achieves an exact 10.4mm thickness, whereas competing versions often sit slightly thicker on the wrist. Furthermore, ARF��s proprietary 904L steel finishing process yields a Jubilee bracelet with noticeably smoother link articulation and superior clasp tolerances.
Full Disclosure: The 18k yellow gold plating tone is marginally warmer than the authentic Rolex alloy, and the simulated diamond bezel prongs lack the microscopic hand-finished refinement of genuine gem-setting.
LIVE PREVIEW
Data Sheet
| MODEL REFERENCE | 278383RBR-0024 |
| FACTORY / VERSION | ARF Edition |
| MOVEMENT | Clone 2236 Automatic |
| CASE MATERIAL | 904L Oystersteel & 18k Yellow Gold Plated |
| WEIGHT & THICKNESS | 83.6g | 10.4mm |
| CRYSTAL & LUME | Sapphire with 2.5x Cyclops | Chromalight (Hands only) |
| DIMENSIONS | 31mm � 37.5mm � 10.4mmManual measurements �� minor tolerances apply. |
| WATER RESISTANCE | 50 Meters �� professional pressure test recommended before swimming |
Collector Q&A
Q: How accurate is the olive green dial color on this ARF 278383RBR?
A: The sunray finish and olive green tone closely mimic the genuine dial, though under direct sunlight, the ARF variant presents a slightly more saturated hue compared to the authentic Rolex lacquer.
Q: Does the Clone 2236 movement in this 31mm model accept genuine Rolex parts?
A: While the Clone 2236 replicates the basic architecture and beat rate of the genuine caliber, it is not a true 1:1 super clone like the Dandong 3235. Genuine Rolex parts will not drop in without significant modification.
Q: How does the weight of the ARF Datejust 31 compare to the authentic piece?
A: This replica weighs exactly 83.6 grams. Because it utilizes 18k gold plating over 904L Oystersteel rather than solid gold center links and bezel, it will feel slightly lighter than the genuine two-tone counterpart.
Q: What is the main technical flaw with the diamond-set bezel on this replica?
A: The synthetic stones used by ARF provide adequate brilliance, but the prong settings are machine-finished. Under a loupe, they lack the meticulous hand-crafted precision of genuine Rolex gem-setting, which can be a tell for experienced horologists.
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