Product Information
* Factory: Clean Factory
* Brand: Rolex
* Collection: GMT-Master II
* Reference: 126715CHNR-0001
* Case Size: 40 mm
* Case Style: Rose Gold-Tone
* Dial: Black Dial
* Movement: 3285 Automatic GMT Movement
* Crystal: Sapphire Crystal
Technical Specifications
* Measured Case Diameter: 40.0 mm
* Measured Case Thickness: 12.2 mm
* Measured Weight: 150 g*
* Movement: 3285 Automatic GMT Movement
* Beat Rate: 28,800 BPH
* Crystal: Sapphire Crystal
*The 150 g weight is the actual measurement of the individual watch inspected. Bracelet sizing, production tolerances and individual assembly may result in minor differences between watches.
Timegrapher Test Results
* Daily Rate: +11 Seconds/Day
* Amplitude: 292°
* Beat Error: 0.0 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 can vary according to power reserve, watch position, temperature and testing conditions. The recorded +11 seconds/day represents the movement performance observed during this inspection rather than a permanently fixed daily rate.
For QC evaluation, the daily rate should be considered together with amplitude, beat error and actual functional testing.
3285 Automatic GMT Movement Performance
This Clean Factory Rolex GMT-Master II 126715CHNR-0001 is equipped with a 3285 automatic GMT movement operating at 28,800 vibrations per hour.
The recorded results were:
* Daily Rate: +11 Seconds/Day
* Amplitude: 292°
* Beat Error: 0.0 ms
* Beat Rate: 28,800 BPH
The recorded data showed stable operation under the testing conditions.
For a GMT model, timegrapher data is only one part of the inspection. The GMT mechanism, local-hour adjustment, date switching, crown operation and winding system should also be tested individually before shipment.
GMT Function Inspection
The GMT function is one of the most important mechanical features of the 126715CHNR.
Pre-shipment inspection should include:
* Main hour and minute hands
* GMT hand operation
* Local-hour adjustment
* Date switching
* Date response during hour-hand adjustment
* Crown positions
* Manual winding
* Automatic winding
* Hand alignment
Special attention should be given to the relationship between the local hour hand, GMT hand and date mechanism to confirm that the functions operate consistently.
40mm Case, 12.2mm Thickness and 150g Weight
The individual watch inspected measured:
* Case Diameter: 40.0 mm
* Case Thickness: 12.2 mm
* Measured Weight: 150 g
The 40 mm diameter and 12.2 mm thickness provide useful real-world dimensional references for this individual QC sample.
The measured 150 g weight should be interpreted together with the case and bracelet construction. It represents the actual inspected watch rather than a guaranteed weight specification for every production piece.
Black Dial Inspection
The black dial creates strong visual contrast with the rose gold-tone case and bracelet.
During QC, important inspection points include:
* Dial surface condition
* Hour-marker alignment
* Printing consistency
* Hand alignment
* GMT-hand alignment
* Date-window positioning
* Date numeral centering
* Cyclops alignment
* Dial cleanliness
Because of the strong contrast between the dial, markers and hands, small alignment differences can be relatively easy to identify under close inspection.
Sapphire Crystal and Cyclops Inspection
The watch uses a sapphire crystal.
QC should include:
* Crystal clarity
* Surface condition
* Correct installation
* Edge condition
* Visible scratches or damage
* Cyclops positioning
* Date visibility
* Alignment relative to the date window
The crystal and cyclops should be inspected from several viewing angles to confirm clean installation and consistent date presentation.
Bezel Inspection
The GMT bezel is both a functional and visually important component of this reference.
Pre-shipment inspection should cover:
* Bezel rotation
* Rotation consistency
* Bezel insert alignment
* 12 o’clock triangle positioning
* Numeral and scale condition
* Excessive lateral movement
* Bezel security
The relationship between the bezel scale and GMT hand should also be visually checked.
Rose Gold-Tone Exterior Finishing
For this configuration, the rose gold-tone exterior makes surface consistency particularly important.
QC should inspect:
* Case surface consistency
* Brushed and polished transitions
* Bezel edge finishing
* Crown surface
* Bracelet-link finishing
* Bracelet color consistency
* Clasp finishing
* Case-to-bracelet integration
The watch should also be checked under different lighting angles because reflective surfaces can reveal small finishing or assembly inconsistencies that are less noticeable under direct lighting.
QC Observations
This Clean Factory Rolex GMT-Master II 126715CHNR-0001 recorded:
* +11 seconds/day
* 292° amplitude
* 0.0 ms beat error
* 28,800 BPH
* 40.0 mm measured diameter
* 12.2 mm measured thickness
* 150 g measured weight
The 3285 automatic GMT movement showed stable performance under the recorded testing conditions.
For this reference, the inspection should place particular emphasis on GMT operation, local-hour adjustment, date switching, bezel alignment, dial details and exterior surface consistency.
The 40 mm case, 12.2 mm measured thickness and 150 g measured weight provide practical reference data for the physical configuration of the inspected watch.
As with other GMT models, final evaluation should be based on the actual individual watch rather than factory reputation alone, particularly because movement readings, hand alignment, bezel positioning and exterior assembly can vary between individual production pieces.
Pre-Shipment QC Inspection
* ✔️ 3285 automatic GMT movement checked
* ✔️ Timegrapher readings recorded
* ✔️ +11 seconds/day rate documented
* ✔️ 292° amplitude recorded
* ✔️ 0.0 ms beat error recorded
* ✔️ 28,800 BPH beat rate confirmed
* ✔️ Automatic winding checked
* ✔️ Manual winding checked
* ✔️ Crown operation checked
* ✔️ Time-setting function checked
* ✔️ GMT hand operation checked
* ✔️ Local-hour adjustment checked
* ✔️ Date switching checked
* ✔️ Case diameter measured at 40.0 mm
* ✔️ Case thickness measured at 12.2 mm
* ✔️ Individual watch weight measured at 150 g
* ✔️ Sapphire crystal inspected
* ✔️ Cyclops alignment checked
* ✔️ Black dial surface inspected
* ✔️ Hour-marker and hand alignment checked
* ✔️ Bezel operation inspected
* ✔️ Bezel insert alignment checked
* ✔️ Exterior surface consistency inspected
* ✔️ Bracelet articulation checked
* ✔️ Bracelet-to-case integration checked
* ✔️ Clasp locking function checked
* ✔️ Overall exterior assembly inspected
* ✔️ Final pre-shipment QC inspection completed
