KF Factory Rolex Yacht-Master II 116680-0002 QC Test

KF Factory Rolex Yacht-Master II 116680-0002 QC Test

This QC test covers the KF Factory Rolex Yacht-Master II 116680-0002, featuring a white dial, sapphire crystal and a modified 7750 movement.

The overall exterior execution of this version is very good. However, there is one important point buyers should understand before choosing this model: because the watch uses a 7750-based modified movement and the original Yacht-Master II mechanism is structurally complex, this version does not reproduce every function.

In particular, the small triangular indicator hand is non-functional.

This is more important than simply judging the watch from exterior photographs, because visually similar versions may not have the same functional implementation.

Actual QC Data

QC Item Actual Test Result
Factory KF Factory
Reference 116680-0002
Model Rolex Yacht-Master II
Dial White
Crystal Sapphire
Movement Modified 7750
Daily Rate +6 s/day
Amplitude 240°
Beat Error 0.0ms
Beat Rate 28,800 BPH
Measured Width 42.4mm
Measured Thickness 14mm
Triangular Indicator Hand Non-functional

These measurements apply to this individual QC sample. Small variations can occur between watches due to production tolerances, power reserve, testing position and measurement method.

Modified 7750 Movement & Timegrapher Test

This KF Factory 116680 uses a 7750-based modified movement.

The movement recorded +6 seconds/day, 240° amplitude, 0.0ms beat error and 28,800 BPH during this test.

The +6 s/day rate falls within our commonly used ±0–15 s/day pre-shipment QC reference range.

For this particular model, however, the timegrapher result is only part of the evaluation. The more important technical consideration is how much of the Yacht-Master II’s complicated mechanism has actually been reproduced.

What We Found: Not Every Function Is Reproduced

The most important finding on this KF Factory Yacht-Master II is the limitation of the modified 7750 movement.

The Yacht-Master II has a complicated mechanical layout. With this 7750-based solution, not every original function can be reproduced through the modified movement architecture.

On this version, the small triangular indicator hand does not have an active function.

This should be clearly distinguished from the other visual details of the watch.

From the outside, the watch can still present the overall Yacht-Master II design well, and the general workmanship of this sample is very good. But a buyer specifically interested in complete mechanical functionality should know about this limitation before choosing the version.

Exterior Quality vs Functional Completeness

This watch illustrates an important point when evaluating complicated models:

Good exterior quality and complete movement functionality are two different things.

The KF Factory 116680 performs well from an overall workmanship perspective, while its modified 7750 provides a practical movement solution for the model.

The trade-off is that the movement cannot fully reproduce every function of the more complicated original mechanism.

For some buyers, exterior finishing and the overall Yacht-Master II appearance may be the priority. For others, whether every indicator and complication actually works may be more important.

That distinction makes the movement configuration worth documenting rather than simply describing the watch as “good quality.”

Actual Case Measurements

This particular sample measured:

Width: 42.4mm
Thickness: 14mm

These are physical measurements taken from this QC sample and provide a useful reference when comparing other Yacht-Master II versions.

Minor measurement differences can occur depending on the exact caliper position and individual production tolerances.

Overall QC Assessment

The KF Factory Yacht-Master II 116680-0002 shows very good overall workmanship, while the movement test recorded +6 s/day with 0.0ms beat error.

The main point buyers should understand is the movement architecture.

Because this version uses a modified 7750 to reproduce a mechanically complicated model, its functional implementation is not complete. The small triangular indicator hand on this version is non-functional.

This does not directly determine the exterior quality of the watch, but it is an important technical limitation for anyone comparing Yacht-Master II versions.

For this reason, this model is better evaluated through two separate questions: How good is the exterior execution? And which mechanical functions actually work?

That provides a more useful assessment than judging the version by appearance alone.

FAQ

What movement does the KF Factory 116680 use?
This QC sample uses a 7750-based modified movement running at 28,800 BPH.

What were the timegrapher results?
The movement recorded +6 seconds/day, 240° amplitude and 0.0ms beat error during this test.

Are all functions of the KF Factory Yacht-Master II operational?
No. Because of the complexity of the movement architecture, this modified 7750 version does not reproduce every function. The small triangular indicator hand is non-functional.

What are the actual measured dimensions?
This specific sample measured 42.4mm in width and 14mm in thickness.