Product Information
* Factory: Clean Factory
* Brand: Rolex
* Collection: Cosmograph Daytona
* Reference: 116519
* Movement: 4130 Automatic Chronograph Movement
* Crystal: Sapphire Crystal
Technical Specifications
* Case Diameter: 40.2 mm
* Case Thickness: 12.3 mm
* Measured Weight: 112.2 g*
* Movement: 4130 Automatic Chronograph Movement
* Beat Rate: 28,800 BPH
* Crystal: Sapphire Crystal
*The measured weight of 112.2 g applies only to the individual watch inspected in this QC report. Minor differences may occur between watches due to manufacturing tolerances, strap sizing and production configuration.
Timegrapher Test Results
* Daily Rate: +2 Seconds/Day
* Amplitude: 290°
* Beat Error: 0.1 ms
* Beat Rate: 28,800 BPH
Testing Note
These readings were recorded from this individual watch during its pre-shipment QC inspection.
Mechanical movement performance may vary depending on power reserve, watch position, wearing habits, temperature and testing conditions. A single timegrapher reading represents the movement’s condition at the time of testing and should not be interpreted as a permanently fixed daily rate.
Movement and Function Test
This Daytona 116519 is equipped with a 4130 automatic chronograph movement operating at 28,800 vibrations per hour.
During inspection, the movement recorded a daily rate of +2 seconds, an amplitude of 290° and a beat error of 0.1 ms. These readings indicate stable performance under the recorded testing conditions.
The automatic winding, manual winding, time-setting and chronograph functions were checked during the pre-shipment inspection. The chronograph start, stop and reset operations should be tested individually before shipment.
New and Older Version Differences
When comparing different production batches of the Daytona 116519, attention should be paid to several version-specific details.
The newer configuration can be identified by the metal edging surrounding the ceramic bezel. Differences may also appear in the movement configuration and the bracelet clasp adjustment system.
The main points to compare are:
* Metal edging around the ceramic bezel
* 4130 movement configuration and finishing
* Chronograph operation
* Clasp structure and adjustment system
* Case dimensions and overall assembly
Because different production batches may remain available at the same time, the actual watch should be inspected rather than relying only on the factory name or advertised version.
QC Observations
The inspected Clean Factory Rolex Daytona 116519 showed stable movement readings and balanced exterior proportions. The measured case diameter was 40.2 mm, while the thickness was 12.3 mm.
The sapphire crystal, ceramic bezel, dial alignment, chronograph hands and clasp mechanism all require individual inspection before shipment. Particular attention should be given to the metal bezel edging, chronograph reset alignment and clasp adjustment structure because these details can differ between older and newer production batches.
The measured weight of 112.2 g also provides a useful reference for confirming the configuration of the inspected watch, although small variations may occur depending on the strap length and production batch.
Clean Factory Market Note
There has been ongoing discussion in the market regarding changes to Clean Factory’s operations and production structure. However, a watch’s quality should not be judged only by the factory name or claims about whether a factory has stopped operating.
Watch production depends on a wider supply chain involving cases, dials, bezels, movements, bracelets and assembly teams. When the relevant suppliers and production resources remain active, watches with similar specifications and finishing may continue to appear in the market.
For this reason, the most important step is to inspect the actual watch received. Movement performance, dimensions, dial alignment, chronograph operation, bezel construction, clasp security and overall finishing provide more reliable information than factory-name claims alone.
Pre-Shipment QC Inspection
* ✔️ 4130 automatic movement checked
* ✔️ Timegrapher readings recorded
* ✔️ Automatic and manual winding checked
* ✔️ Time-setting function checked
* ✔️ Chronograph start, stop and reset tested
* ✔️ Chronograph hand reset alignment checked
* ✔️ Case diameter measured at 40.2 mm
* ✔️ Case thickness measured at 12.3 mm
* ✔️ Individual watch weight measured at 112.2 g
* ✔️ Sapphire crystal inspected
* ✔️ Ceramic bezel and metal edging inspected
* ✔️ Dial, markers and hands checked
* ✔️ Strap and clasp adjustment system inspected
* ✔️ Exterior finishing and assembly checked
* ✔️ Final pre-shipment QC inspection completed
