QF Factory Rolex Daytona 116519LN Racing Grey Dial — Actual QC Test & Measurements
QF Factory Rolex Daytona 116519LN Racing Grey Dial — Actual QC Test & Measurements
Overview
This QC report documents an individual QF Factory Rolex Cosmograph Daytona 116519LN, featuring a Racing Grey dial with Arabic numeral hour markers, a white gold-tone case, a black Oysterflex-style strap, and a 4130 automatic chronograph movement.
The inspected watch recorded a daily rate of +5 seconds, an amplitude of 315°, and a beat error of 0.1 ms at 28,800 BPH. Actual measurements showed a case width of 40.0mm, thickness of 12.2mm, and total weight of 160.8g.
This particular sample uses the regulated 4130 movement version. QF Factory also offers a free-sprung movement option, which should be considered a separate configuration.
Importantly, all chronograph functions were confirmed to be operational during inspection. The chronograph mechanism provides actual elapsed-time measurement rather than decorative subdial displays.
The inspected sample also demonstrated competitive exterior finishing. Certain details appear particularly well executed compared with expectations for this category.
QF Factory’s production and product refinement cycles may differ from those of other manufacturers. However, factory reputation, release frequency, and production volume should not replace direct evaluation of individual watches.
This report focuses on the measured movement performance, verified chronograph functionality, physical dimensions, weight, and version-specific characteristics of the inspected sample.
Actual QC Data
Inspection Item Recorded Result
Factory QF Factory
Brand / Collection Rolex Cosmograph Daytona
Reference 116519LN
Nominal Case Size 40mm
Dial Racing Grey
Hour Markers Arabic Numerals
Case Appearance White Gold-Tone
Strap Black Oysterflex-Style
Movement 4130 Automatic Chronograph
Tested Movement Version Regulated
Alternative Movement Option Free-Sprung
Daily Rate +5 sec/day
Amplitude 315°
Beat Error 0.1 ms
Beat Rate 28,800 BPH
Chronograph Functions Confirmed Operational
Measured Case Width 40.0mm
Measured Thickness 12.2mm
Measured Total Weight 160.8g
Crystal Sapphire
All measurements and movement readings apply to this individual regulated 4130 sample. Specifications and results may vary between production batches and movement configurations.
1. Movement Performance — Regulated 4130
The inspected Daytona uses a 4130 automatic chronograph movement with a conventional regulated balance configuration.
The Timegrapher recorded:
* Daily Rate: +5 seconds/day
* Amplitude: 315°
* Beat Error: 0.1 ms
* Beat Rate: 28,800 BPH
The recorded daily rate falls within the approximately ±0–15 seconds/day reference range used for this pre-shipment QC assessment.
An amplitude of 315° indicates a substantial recorded balance swing under the test conditions. However, amplitude should be interpreted alongside the movement’s operating state, the instrument’s lift-angle setting, and the measurement position.
The 0.1 ms beat error indicates a small timing difference between alternating balance oscillations.
Together, these readings provide a favorable performance reference for the inspected movement.
A single Timegrapher measurement does not guarantee identical accuracy across multiple positions, different power-reserve levels, or extended daily use.
2. Chronograph Function Test — Fully Operational
One of the most important findings from this inspection is that all chronograph functions were confirmed to be operational.
The inspected 4130 movement provides genuine chronograph functionality rather than relying on decorative subdial arrangements.
This distinction matters because a watch may display acceptable Timegrapher readings while still having problems with its chronograph mechanism.
The functional assessment confirms that the chronograph system operates on this individual sample.
For a Daytona equipped with a 4130 automatic chronograph movement, relevant functions include elapsed-time measurement, chronograph start and stop, reset operation, and the associated chronograph displays.
The successful functional assessment complements the recorded Timegrapher data and provides a more complete picture of the movement’s condition.
QC Finding: All chronograph functions were confirmed operational on the inspected regulated 4130 version.
This result applies to the specific sample tested and should not automatically be extended to other production batches or the optional free-sprung configuration.
3. Regulated vs Free-Sprung 4130 Movement
QF Factory offers two movement configurations for this Daytona model:
Regulated 4130: The version inspected in this report.
Free-Sprung 4130: An alternative version available from the factory.
A conventional regulated movement typically uses a regulator mechanism to adjust the effective working length of the hairspring.
A free-sprung balance generally adjusts the balance’s inertia rather than relying on a conventional regulator index.
These are different approaches to movement regulation.
A free-sprung balance does not automatically guarantee better timekeeping accuracy. Actual performance depends on movement construction, assembly, adjustment, and operating conditions.
Comparison Regulated Version Free-Sprung Version
Available from QF Factory Yes Yes
Tested in This Report Yes No
Recorded Daily Rate +5 sec/day Not Tested
Recorded Amplitude 315° Not Tested
Recorded Beat Error 0.1 ms Not Tested
Chronograph Functions Confirmed Operational Not Tested in This Report
The distinction is important when comparing prices, movement photographs, and QC results.
All measurements and functional findings in this article belong to the regulated version.
4. Actual Case Dimensions and Weight
The inspected watch recorded the following physical measurements:
Measurement Actual QC Result
Case Width 40.0mm
Case Thickness 12.2mm
Total Weight 160.8g
The measured width corresponds to the nominal 40mm Daytona size classification.
The 12.2mm thickness provides a useful reference when comparing case profiles between factory versions.
The most notable physical measurement is the 160.8g total weight, particularly because this configuration uses an Oysterflex-style strap rather than a full metal bracelet.
This weight is specific to the inspected sample.
It does not independently establish the exact case material, internal weighting method, or distribution of mass between the case and strap components.
When comparing different QF Factory Daytona configurations, both the movement version and actual measured weight should be confirmed.
5. Racing Grey Dial and Arabic Numeral Details
The Racing Grey dial is a defining visual characteristic of the Daytona 116519LN.
Unlike Daytona models with conventional baton-style markers, this configuration features Arabic numeral hour markers, creating a more distinctive motorsport-inspired appearance.
The dial combines multiple visual elements, making alignment and finishing especially important.
Relevant inspection areas include:
* Arabic numeral positioning
* Dial color consistency
* Chronograph subdial alignment
* Printing clarity
* Minute-track positioning
* Hand alignment
* Applied marker finishing
* Visible dust or contamination
The arrangement of the chronograph subdials is particularly important because spacing, printing, and hand positioning strongly influence the overall appearance.
Close-up photographs and actual QC videos are more useful for evaluating these details than promotional product images alone.
6. White Gold-Tone Case and Exterior Finishing
The inspected watch features a white gold-tone case appearance.
This description refers to the visible finish and should not be interpreted as confirmation of solid white gold construction.
Relevant exterior inspection areas include:
* Case polishing
* Lug shape and transitions
* Crown and chronograph pusher alignment
* Bezel positioning
* Case-edge finishing
* Strap attachment points
* Surface consistency
* Visible scratches or manufacturing defects
The inspected QF Factory sample presented a favorable overall impression in terms of exterior execution.
Some details appeared competitive with versions produced by other factories.
However, determining whether one factory is consistently superior requires direct comparisons of equivalent models and production batches under similar conditions.
7. Oysterflex-Style Strap and Wearing Configuration
The Daytona 116519LN uses a black Oysterflex-style strap.
Unlike a full metal bracelet, this configuration concentrates a greater proportion of the total weight around the watch case.
For a sample weighing 160.8g, the relationship between case weight, strap construction, and wearing balance is worth considering.
Relevant inspection points include:
* Strap surface consistency
* Flexibility
* Attachment security
* Clasp operation
* Fit between strap and case
* Visible deformation
* Edge finishing
The supplied QC data does not establish the exact internal structure or material composition of the strap.
The term Oysterflex-style describes the configuration without claiming identical construction to the genuine Rolex component.
8. QF Factory Development and Quality Assessment
Based on the inspected sample, QF Factory has demonstrated a level of Daytona exterior finishing that deserves consideration alongside other established factory versions.
Certain details may compare favorably with competing products, depending on the exact model, production batch, and component being evaluated.
Factory production schedules and refinement cycles can also influence how quickly specific details are improved.
However, a factory that releases fewer models or updates products less frequently is not necessarily producing lower-quality watches.
The more reliable approach is to evaluate current production versions through actual QC evidence rather than relying exclusively on factory reputation.
For this QF Factory Daytona 116519LN, the movement readings, confirmed chronograph functionality, 160.8g weight, and observed exterior quality provide meaningful information about the inspected regulated version.
9. QC Findings and Assessment
The inspected QF Factory Rolex Daytona 116519LN recorded the following results.
Movement Performance
* Daily Rate: +5 sec/day
* Amplitude: 315°
* Beat Error: 0.1 ms
* Beat Rate: 28,800 BPH
Functional Assessment
* 4130 automatic chronograph movement
* Regulated movement configuration
* All chronograph functions confirmed operational
* Functional chronograph displays rather than decorative subdials
Physical Measurements
* Width: 40.0mm
* Thickness: 12.2mm
* Weight: 160.8g
Exterior Characteristics
* Racing Grey dial with Arabic numerals
* White gold-tone case appearance
* Black Oysterflex-style strap
* Sapphire crystal
* Favorable overall exterior finishing
The recorded movement data falls within the pre-shipment QC reference range.
The chronograph functionality was also confirmed during inspection.
These findings provide a more complete assessment than movement readings alone.
The most important version distinction remains that this report documents the regulated 4130 configuration, not the optional free-sprung version.
QC Status
Inspection Area Assessment
Movement Readings Within QC Reference Range
Chronograph Functions Confirmed Fully Operational
Physical Measurements Recorded
Tested Movement Version Regulated 4130
Exterior Assessment Positive Overall Impression
Alternative Configuration Free-Sprung Version Available
Final Shipment Status Subject to Remaining Exterior and Pre-Shipment Checks
FAQ
1. What movement does the QF Factory Daytona 116519LN use?
The inspected watch uses a 4130 automatic chronograph movement with a regulated balance configuration operating at 28,800 BPH.
2. Are all chronograph functions operational?
Yes. All chronograph functions were confirmed operational on the inspected sample. The chronograph displays are functional rather than purely decorative.
3. Does QF Factory offer a free-sprung movement version?
Yes. QF Factory also offers a free-sprung configuration. However, this QC report covers the regulated version only.
4. What were the actual Timegrapher results?
The watch recorded +5 seconds/day, 315° amplitude, and 0.1 ms beat error at 28,800 BPH.
5. What are the actual case dimensions and weight?
The inspected sample measured 40.0mm in width, 12.2mm in thickness, and 160.8g in total weight.
6. Is the QF Factory Daytona better than versions from other factories?
The inspected sample demonstrated competitive exterior finishing, favorable movement readings, and confirmed chronograph functionality.
However, determining which factory produces the better version requires direct comparisons of equivalent models and production batches. Movement configuration, weight, chronograph operation, and individual QC results should all be considered.
