Product Information
* Factory: RM Factory
* Brand: Richard Mille
* Model: RM 21-01
* Movement: Manual-Winding Tourbillon Movement
* Movement Type: Hand-Wound Mechanical
* Crystal: Sapphire Crystal
Technical Specifications
* Case Width: 45.0 mm
* Case Thickness: 15.9 mm
* Measured Weight: 132.3 g*
* Movement: Manual-Winding Tourbillon Movement
* Beat Rate: 28,800 BPH
* Crystal: Sapphire Crystal
* Winding System: Manual Winding
*The measured weight of 132.3 g applies to the individual watch inspected in this QC report. Minor differences may occur between individual watches due to production tolerances, strap configuration and batch differences.
Timegrapher Test Results
* Daily Rate: -4 Seconds/Day
* Amplitude: 319°
* Beat Error: 0.0 ms
* Beat Rate: 28,800 BPH
Testing Note
The readings above were recorded from this individual watch during its pre-shipment QC inspection.
Mechanical movement performance may vary depending on mainspring power, watch position, ambient temperature and testing conditions. The recorded -4 seconds/day represents the movement’s performance at the time of inspection rather than a permanently fixed daily rate.
For a tourbillon watch, timegrapher data should be considered together with the actual operation of the tourbillon mechanism and manual-winding system.
Manual-Winding Tourbillon Movement
This RM Factory Richard Mille RM 21-01 is equipped with a manual-winding tourbillon movement.
Unlike an automatic movement, this movement does not rely on a rotor for winding. Power is supplied by manually winding the crown.
During this QC inspection, the movement recorded:
* Daily Rate: -4 Seconds/Day
* Amplitude: 319°
* Beat Error: 0.0 ms
* Beat Rate: 28,800 BPH
The movement showed stable operation under the recorded testing conditions.
For pre-shipment QC, the inspection should include not only the timegrapher readings but also crown winding, time setting, tourbillon operation and available movement functions.
Tourbillon Operation Inspection
The tourbillon mechanism is the primary functional mechanical feature of this version.
During QC, the tourbillon should be observed directly to confirm that the cage rotates consistently and operates without obvious interruption.
Important inspection points include:
* Tourbillon cage rotation
* Consistency of tourbillon operation
* No visible stopping or hesitation
* Manual winding resistance
* Crown operation
* Time-setting operation
* Movement stability after winding
Because this is a hand-wound movement, the wearer will need to wind the watch manually to maintain sufficient power.
Important Note: Decorative Small Hands
An important point to understand before choosing this RM Factory RM 21-01 is that some of the small hands or indications visible on the dial are decorative and do not provide active functions.
They should therefore not be interpreted as fully operational complications.
The main functional attraction of this version is the tourbillon movement, rather than a complete reproduction of every display or complication visible on the watch.
This distinction is important when evaluating the model.
For someone primarily interested in the RM 21-01 design, case architecture and visible tourbillon mechanism, this version may still be worth considering.
However, for a buyer whose priority is having every visible indication fully functional, this configuration may not be the most suitable choice.
Being clear about functional and decorative elements before purchase provides a more accurate understanding of what the watch actually offers.
Manual Winding Considerations
Because this model uses a manual-winding movement, it requires a different ownership routine from an automatic watch.
The crown should be wound carefully and progressively. If resistance increases significantly as the movement approaches a fully wound state, additional force should not be applied.
Important operating considerations include:
* Wind the movement manually before use when required
* Turn the crown smoothly rather than rapidly
* Stop applying force if strong resistance is felt
* Do not force the crown beyond its normal winding range
* Confirm the tourbillon starts and continues operating after winding
Correct winding technique is particularly important for a mechanically complex tourbillon movement.
Case Dimensions and Weight
The individual RM 21-01 inspected measured:
* Case Width: 45.0 mm
* Case Thickness: 15.9 mm
* Measured Weight: 132.3 g
These measurements apply to the individual watch used for this QC inspection.
The sapphire crystal should also be inspected for clarity, surface condition and correct installation before shipment.
QC Observations
The RM Factory Richard Mille RM 21-01 is a model where understanding the actual movement functions before purchase is particularly important.
During this QC inspection, the manual-winding tourbillon movement recorded a -4 seconds/day rate, 319° amplitude and 0.0 ms beat error.
The individual watch measured 45.0 mm in width, 15.9 mm in thickness and 132.3 g in weight.
The main mechanical feature is the operational tourbillon. Some smaller dial indications are decorative rather than functional, so this model should not be described as a fully functional version of every displayed complication.
For buyers primarily attracted to the RM 21-01 appearance and tourbillon movement, this configuration provides those core characteristics. Buyers who specifically require every visible dial indication to operate should take this limitation into account before choosing the model.
Pre-Shipment QC Inspection
* ✔️ Manual-winding tourbillon movement checked
* ✔️ Timegrapher readings recorded
* ✔️ -4 seconds/day rate documented
* ✔️ 319° amplitude recorded
* ✔️ 0.0 ms beat error recorded
* ✔️ Tourbillon cage operation inspected
* ✔️ Tourbillon rotation consistency checked
* ✔️ Manual winding function checked
* ✔️ Crown winding resistance inspected
* ✔️ Time-setting function checked
* ✔️ Functional and decorative displays identified
* ✔️ Case width measured at 45.0 mm
* ✔️ Case thickness measured at 15.9 mm
* ✔️ Individual watch weight measured at 132.3 g
* ✔️ Sapphire crystal inspected
* ✔️ Dial and hand alignment checked
* ✔️ Strap and clasp inspected
* ✔️ Exterior finishing and overall assembly checked
* ✔️ Final pre-shipment QC inspection completed
