PZ Factory Vacheron Constantin Overseas Dual Time 7900V/110A-B334 QC Inspection Report
Product Information
* Factory: PZ Factory
* Brand: Vacheron Constantin
* Collection: Overseas Dual Time
* Reference: 7900V/110A-B334
* Case Size: 41 mm
* Case / Bracelet: Full Steel
* Dial: Blue Dial
* Movement: 5110DT Modified Automatic Movement
* Crystal: Sapphire Crystal
* Functions: Dual Time and related dial functions are operational
Technical Specifications
* Measured Case Width: 40.7 mm
* Measured Case Thickness: 13.6 mm
* Measured Weight: 167.4 g*
* Movement: 5110DT Modified Automatic Movement
* Beat Rate: 21,600 BPH
* Crystal: Sapphire Crystal
*The 167.4 g weight is the actual measurement of the individual watch inspected. Minor differences may occur between individual watches due to bracelet sizing, production tolerances and individual assembly.
Timegrapher Test Results
* Daily Rate: +11 Seconds/Day
* Amplitude: 285°
* Beat Error: 0.4 ms
* Beat Rate: 21,600 BPH
Testing Note
These readings were recorded from this individual watch during its pre-shipment QC inspection.
Mechanical movement readings may vary depending on mainspring power, watch position, ambient temperature and testing conditions. The recorded +11 seconds/day represents the performance observed at the time of inspection rather than a permanently fixed daily rate.
For QC evaluation, daily rate should be considered together with amplitude, beat error and actual functional testing.
5110DT Modified Movement Performance
This PZ Factory Vacheron Constantin Overseas Dual Time 7900V/110A-B334 uses a 5110DT modified automatic movement.
During this inspection, the movement recorded:
* Daily Rate: +11 Seconds/Day
* Amplitude: 285°
* Beat Error: 0.4 ms
* Beat Rate: 21,600 BPH
The movement operated consistently under the recorded testing conditions.
Because this is a multi-function model, timegrapher readings alone are not sufficient for final QC. Each available function should also be operated individually before shipment.
Functional Dual Time Display
An important feature of this version is that the displayed complications are functional rather than decorative-only elements.
During pre-shipment QC, the available functions should be individually operated to confirm that they respond correctly.
Inspection should include:
* Main time display
* Second time-zone display
* Date function
* Day/night indication
* Crown operation
* Time adjustment
* Function adjustment
* Automatic winding
* Manual winding
This is particularly important on a multi-function watch because correct visual appearance alone does not confirm that the underlying mechanisms operate properly.
Rotor Sound: Important Operating Characteristic
One characteristic customers should understand before choosing this version is the sound of the automatic rotor.
The rotor can produce a more noticeable sound than some conventional automatic movements. This is related to the construction of the modified movement and does not, by itself, indicate that the movement is defective.
During QC, rotor sound should be considered together with actual operation.
The important points are whether:
* The rotor rotates normally
* Automatic winding operates correctly
* There is no abnormal sticking
* There is no contact with surrounding components
* The movement maintains normal operation
If the rotor is functioning correctly and the automatic winding system works normally, a more noticeable rotor sound can be considered a characteristic of this movement configuration.
For customers who are particularly sensitive to movement noise, this point should be understood before purchase.
40.7mm Case, 13.6mm Thickness and 167.4g Weight
The individual watch inspected measured:
* Case Width: 40.7 mm
* Case Thickness: 13.6 mm
* Measured Weight: 167.4 g
These measurements provide actual physical reference data for this individual QC sample.
The full-steel construction contributes to the 167.4 g measured weight, while the 40.7 mm width and 13.6 mm thickness define the overall case proportions.
Small differences may occur between individual production pieces.
Blue Dial and Multi-Function Display Inspection
Because the Overseas Dual Time uses several dial indications, alignment is particularly important.
QC should focus on:
* Blue dial surface
* Dial printing
* Hour-marker alignment
* Main hand alignment
* Dual-time hand alignment
* Date display
* Day/night indicator
* Function-hand positioning
* Dial cleanliness
Each functional indication should be visually inspected and then operated to confirm that it is not simply decorative.
Sapphire Crystal Inspection
The watch uses a sapphire crystal.
Pre-shipment QC should check:
* Crystal clarity
* Surface condition
* Correct installation
* Edge condition
* Visible scratches or damage
* Clear visibility of all dial indications
Full-Steel Case and Bracelet
The integrated steel bracelet is an important part of the Overseas design and contributes significantly to the overall feel of the watch.
Inspection should include:
* Case finishing
* Brushed and polished transitions
* Bezel finishing
* Bracelet-link articulation
* Bracelet surface condition
* Case-to-bracelet integration
* Clasp opening and closing
* Clasp locking security
These areas should be inspected on the individual watch because small assembly and finishing differences may occur between pieces.
QC Observations
This PZ Factory Vacheron Constantin Overseas Dual Time 7900V/110A-B334 recorded:
* +11 seconds/day
* 285° amplitude
* 0.4 ms beat error
* 21,600 BPH
* 40.7 mm measured width
* 13.6 mm measured thickness
* 167.4 g measured weight
A particularly relevant feature of this version is that its available Dual Time functions are operational rather than decorative displays. For that reason, each complication should be individually tested during QC.
Another characteristic worth explaining is the rotor sound. Because this model uses a modified 5110DT movement, the rotor can sound more noticeable than on some standard automatic movements. This alone should not be interpreted as a defect when the rotor and automatic winding system are operating normally.
For customers who expect an almost silent automatic rotor, however, this characteristic should be considered before choosing the model.
Pre-Shipment QC Inspection
* ✔️ 5110DT modified automatic movement checked
* ✔️ Timegrapher readings recorded
* ✔️ +11 seconds/day rate documented
* ✔️ 285° amplitude recorded
* ✔️ 0.4 ms beat error recorded
* ✔️ 21,600 BPH beat rate confirmed
* ✔️ Automatic winding function checked
* ✔️ Manual winding function checked
* ✔️ Rotor operation and sound checked
* ✔️ Crown operation checked
* ✔️ Main time-setting function checked
* ✔️ Dual-time function checked
* ✔️ Date function checked
* ✔️ Day/night indication checked
* ✔️ Available complications functionally tested
* ✔️ Case width measured at 40.7 mm
* ✔️ Case thickness measured at 13.6 mm
* ✔️ Individual watch weight measured at 167.4 g
* ✔️ Sapphire crystal inspected
* ✔️ Blue dial surface checked
* ✔️ Dial and hand alignment inspected
* ✔️ Case and bezel finishing checked
* ✔️ Bracelet articulation inspected
* ✔️ Bracelet-to-case integration checked
* ✔️ Clasp locking function checked
* ✔️ Final pre-shipment QC inspection completed
QC Status
Inspection Result: PASS
QC Status: Pre-Shipment Quality Inspection Completed
