TK Factory AP Royal Oak Offshore 26400, 26238 and 26470 Chronograph Technical Guide
The TK Factory AP Royal Oak Offshore Chronograph range covers configurations associated with the 26400, 26238 and 26470 reference families.
According to the supplied production information, the series includes customized 3126-style automatic chronograph movements, selected carbon-composite case configurations, textured dials and multiple strap materials.
One of the principal technical features described for this TK series is the running small-seconds display at 12 o’clock, together with the modified chronograph movement architecture.
Because the three reference families can differ in their construction and specifications, this guide focuses on the shared technical characteristics of the TK Offshore range. Individual reference-specific dimensions, materials and movement configurations should be documented separately.
Royal Oak Offshore Chronograph Design
The Royal Oak Offshore collection develops the recognizable Royal Oak design into a larger and more technically oriented sports-chronograph format.
Its defining characteristics include an octagonal bezel, pronounced case construction, chronograph pushers and a multi-register dial.
The TK Factory range described here covers several Offshore reference families rather than a single identical watch configuration.
The relationship between the case, dial and movement therefore needs to be recorded at the specific reference level.
26400, 26238 and 26470 Reference Families
The supplied TK Factory information identifies three Offshore reference families:
Reference Family Technical Classification
26400 Royal Oak Offshore Chronograph family
26238 Royal Oak Offshore Chronograph family
26470 Royal Oak Offshore Chronograph family
These reference families should not automatically be assumed to share identical case dimensions, movement construction or subdial arrangements.
A specific 26238 configuration, for example, should not be assigned a 3126-style movement solely because that movement is described elsewhere in the TK range.
For a reliable technical database, each full reference should be connected to its actual movement and case configuration.
Customized 3126-Style Chronograph Movement
The supplied TK Factory range is described as using a customized 3126-style automatic chronograph movement in selected configurations.
The movement is intended to reproduce the functional layout associated with the corresponding Offshore chronograph design.
However, the supplied information does not identify the underlying base caliber or provide sufficient technical evidence to classify the movement as an original AP Calibre 3126.
For database purposes, the appropriate classification is:
Movement Appearance: Calibre 3126-Style
Movement Type: Customized Automatic Chronograph
Underlying Base Caliber: Not Confirmed
This distinction is important because visual movement construction and actual mechanical architecture are not necessarily identical.
Running Small Seconds at 12 O’Clock
The supplied TK configuration emphasizes a running small-seconds display at 12 o’clock.
This is a useful feature for identifying a particular chronograph dial arrangement.
Running small seconds indicate the continuous operation of the movement and should be distinguished from the chronograph seconds hand.
The two indications serve different mechanical purposes.
The small-seconds display reflects normal movement operation, while the chronograph seconds hand is used for elapsed-time measurement when the chronograph is activated.
Because subdial layouts can differ across Offshore reference families, the 12 o’clock small-seconds configuration should be associated only with the specific TK versions confirmed to use it.
Chronograph Functions
The supplied movement is described as supporting the chronograph functions of its corresponding dial configuration.
A mechanical chronograph normally incorporates a start, stop and reset sequence.
However, the exact subdial functions and elapsed-time counters depend on the movement architecture installed in the watch.
For this reason, a three-register dial should not automatically be treated as evidence that every chronograph indication is mechanically operational.
Actual functionality is best established through movement testing and documented separately in the individual QC record.
Carbon-Composite Case Configurations
Selected TK Factory Offshore models are described as using carbon-fiber composite cases.
The supplied information refers to Carbon TPT® B.4, a material designation associated with advanced layered carbon-composite construction.
However, the exact material composition of the TK Factory case has not been independently verified.
It is therefore more accurate to describe these versions as using a carbon-composite or Carbon TPT-style case construction, rather than claiming certified Carbon TPT® B.4 material.
Carbon-composite cases can provide a different balance of weight, stiffness and surface appearance compared with conventional metal cases.
Their actual properties depend on the fibers, resin system, manufacturing process and internal structure.
Layered Carbon Appearance
Layered carbon composites can display visible patterns created by the arrangement of carbon-fiber layers.
These patterns may vary between individual cases because the visible surface depends on how the material is formed and finished.
The resulting appearance differs from a simple printed carbon-fiber pattern or decorative surface coating.
However, visible layering alone does not establish a particular patented material composition.
For technical documentation, the distinction between structural carbon composite and decorative carbon-pattern finishes is more useful than broad claims about material superiority.
Material Strength and Density Claims
The supplied factory description refers to improvements in density, fiber hardness and resin strength.
These numerical claims should not be transferred directly to the TK watch without independent material documentation.
Mechanical properties such as density, impact resistance and tensile strength depend on the complete composite system.
A material that performs well in one mechanical test does not necessarily provide superior performance under every form of impact or stress.
The TK carbon-composite case should therefore be described according to its verified construction rather than unsupported performance percentages.
Textured Dial Construction
The TK Factory Offshore range features textured dials inspired by the geometric patterns associated with the Royal Oak Offshore collection.
The supplied information describes the use of CNC-related manufacturing and finishing processes to produce the raised dial pattern.
For technical documentation, the relevant characteristics include pattern depth, surface definition, printing alignment and the finishing of individual raised sections.
The dial also incorporates chronograph subdials and applied elements whose exact arrangement depends on the reference.
Dial Color and Surface Treatment
The supplied TK configurations use colored dial treatments described as involving electroplating-related processes.
The exact production method has not been independently established for each version.
A useful technical distinction is the difference between the dial’s structural texture and its surface color treatment.
The textured base provides the three-dimensional pattern, while the surface finish influences color, reflectivity and visual contrast.
Because dial color can change significantly with lighting and camera settings, absolute claims of identical color matching should be avoided.
Crown and Pusher Construction
The Offshore chronograph design incorporates a crown and separate chronograph controls.
The supplied TK information also describes a slightly movable crown-related component.
Because the exact mechanical arrangement is not clearly specified, this should not be interpreted as a confirmed functional feature across all reference families.
Crown and pusher construction should instead be documented according to the individual watch.
Fluororubber Strap Configuration
Selected TK Offshore configurations are described as using fluororubber straps.
Fluororubber is a synthetic elastomer valued for resistance to many chemicals, temperature variations and environmental conditions.
Its suitability for a watch strap also depends on the specific compound, strap geometry and attachment construction.
For database classification, the fluororubber strap should be recorded as a material option rather than a movement or watch-generation difference.
Alligator Leather Strap Configuration
The supplied TK range also includes straps described as using American alligator leather.
Without supporting material or origin documentation, the exact species and geographic origin should be treated as supplier-stated information.
Leather straps differ from rubber straps in flexibility, moisture tolerance, maintenance and long-term wear characteristics.
The choice of strap affects the wearing experience but does not change the underlying movement architecture.
Technical Specifications
Specification TK Factory Offshore Range
Factory TK Factory
Brand Audemars Piguet
Collection Royal Oak Offshore
Reference Families 26400 / 26238 / 26470
Watch Type Mechanical Chronograph
Movement Customized 3126-Style, Selected Configurations
Winding Automatic, Selected Configurations
Movement Base Not Confirmed
Running Small Seconds 12 O’Clock, Selected Configurations
Case Material Reference-Dependent
Carbon Case Option Carbon-Composite / TPT-Style
Dial Textured Chronograph Dial
Dial Finishing Supplier-Described Surface Treatment
Rubber Strap Fluororubber, Selected Configurations
Leather Strap Supplier-Stated Alligator Leather
Case Diameter Reference-Dependent
Case Thickness Reference-Dependent
Weight Reference-Dependent
Actual QC & Movement Testing
The specifications above describe the TK Factory Royal Oak Offshore range. Individual watches should be evaluated according to their exact reference, movement and case configuration.
For first-hand Timegrapher results, measured dimensions, weight, chronograph function testing, subdial operation and case-material observations, refer to the corresponding TK Factory Royal Oak Offshore QC record.
Relevant QC records should be organized by reference family:
TK Factory AP Royal Oak Offshore 26400 QC Test
TK Factory AP Royal Oak Offshore 26238 QC Test
TK Factory AP Royal Oak Offshore 26470 QC Test
Each link should lead to the corresponding actual QC article rather than a general product page.
FAQ
Which Royal Oak Offshore references are included in this TK Factory range?
The supplied information identifies the 26400, 26238 and 26470 reference families. Exact specifications depend on the individual model.
What movement does the TK Factory Offshore chronograph use?
Selected configurations are described as using a customized 3126-style automatic chronograph movement. The underlying base caliber has not been confirmed.
Does every TK Offshore version have running small seconds at 12 o’clock?
Not necessarily. The supplied information describes this feature, but the exact subdial arrangement should be confirmed for each reference.
Does the TK Factory carbon case use genuine Carbon TPT B.4?
The supplier describes a Carbon TPT B.4-related construction. Without independent material verification, the case should be classified as carbon-composite or Carbon TPT-style.
What strap materials are available?
The supplied range includes fluororubber and alligator-leather-described strap options, depending on the configuration.
Where can I find actual movement measurements and chronograph testing?
Individual QC records provide reference-specific Timegrapher measurements, dimensions, weight and chronograph function observations.
