B Factory Rolex Sky-Dweller 336238-0001 42mm Yellow Gold Oysterflex Champagne Dial

B.Factory Rolex Sky-Dweller 42mm Weighted 187g 9002

The B.Factory Rolex Sky-Dweller is a 42mm weighted mechanical watch featuring an approximately 187g total weight, a 13.8mm case thickness, and a 9002 automatic mechanical movement configuration.

This version combines the Sky-Dweller’s multiple calendar and travel-related displays, including date, month, annual calendar, and GMT dual-time functions, with a rotating fluted bezel used as part of the function-selection and adjustment system.

The supplied B.Factory specification describes the weighted construction as using a 904L stainless steel exterior with internal weighting, rather than increasing weight primarily through an enlarged or thickened caseback.

42mm Case

The B.Factory Sky-Dweller measures:

Diameter: 42mm
Thickness: 13.8mm

These measurements provide useful reference points when comparing different Sky-Dweller versions.

The 42mm diameter provides sufficient dial area for the central time display, secondary time-zone indication, date, month markers, and annual-calendar architecture.

At 13.8mm thick, the case maintains the proportions required to accommodate the automatic movement and weighted internal construction.

Approximately 187g Total Weight

One of the main characteristics of this B.Factory configuration is its supplied total weight of approximately:

187g

This is significantly more useful as a comparison point than simply describing the watch as a “heavy” or “weighted” version.

However, total weight should not be considered independently from weight distribution.

How the additional mass is distributed between the case, internal components, bracelet or strap, and clasp can influence how the watch actually feels on the wrist.

Internal Weighted Construction

According to the supplied B.Factory specification, the watch uses a 904L stainless steel exterior combined with internal weighting.

The stated design approach is intended to increase overall mass without relying primarily on an unusually thick or enlarged caseback.

This is an important distinction when comparing weighted versions because two watches can achieve similar total weights through very different construction methods.

B.Factory also refers to an additional internal weighting material, but its precise alloy composition has not been provided. It is therefore more accurate to describe it simply as an internal weighted structure rather than assigning an unverified material specification.

904L Stainless Steel Exterior

The supplied configuration identifies the exterior steel components as 904L stainless steel.

904L is an austenitic stainless-steel grade used in applications where corrosion resistance and surface finishing are important considerations.

The material specification should nevertheless be kept separate from the internal weighting system: the exterior steel construction and the higher-density internal components perform different roles within the overall watch architecture.

9002 Automatic Mechanical Movement

The B.Factory Sky-Dweller is supplied with a 9002 automatic mechanical movement configuration.

The movement supports several functions:

* Hours and minutes
* Date display
* Month indication
* Annual-calendar system
* GMT / second-time-zone display
* Bezel-linked function adjustment

The supplied movement specification also lists a frequency of:

28,800 vibrations per hour (4 Hz).

For technical accuracy, this should be described as a 9002 movement configuration rather than a genuine Rolex-manufactured Calibre 9002 unless the movement’s manufacture is independently established.

Annual Calendar Function

One of the defining complications of the Sky-Dweller architecture is its annual calendar.

An annual calendar is mechanically different from a simple date mechanism because it is designed to account for months with 30 and 31 days.

It does not, however, mechanically account for February’s varying length in the same way as a perpetual calendar.

This distinction is important when describing the watch accurately: an annual calendar and perpetual calendar are not the same complication.

Month Display

The dial incorporates a month indication as part of the annual-calendar system.

This allows the wearer to read both the current date and month while maintaining the main time and second-time-zone displays.

The month display is mechanically linked to the broader calendar architecture rather than functioning as a purely decorative dial feature.

GMT / Dual-Time Display

The 9002 configuration incorporates a second-time-zone display, allowing two time references to be read from the watch.

This function is particularly relevant to the Sky-Dweller architecture because it combines travel-time information with an annual calendar in the same mechanical system.

Rather than adding a conventional independent GMT hand, the second time zone is integrated into the dial architecture.

Rotating Fluted Bezel

The watch uses a rotating fluted bezel.

This bezel is not merely an exterior decorative component. In the Sky-Dweller architecture, bezel rotation forms part of the system used to select functions for adjustment.

This makes the bezel mechanically relevant to the operation of the watch and distinguishes it from conventional fixed fluted bezels.

Sapphire Crystal

The front of the watch is fitted with a sapphire crystal.

Sapphire provides a hard, transparent surface over the dial and allows the multiple calendar and dual-time indications to remain clearly visible.

No additional crystal coating specification has been independently confirmed from the supplied information, so the description is limited to sapphire crystal.

Luminous Dial and Hands

The dial and hands incorporate luminous material to improve visibility under reduced lighting.

The supplied version describes the luminous appearance as an ice-blue tone.

Because actual brightness and duration can vary between batches and depend on charging conditions, no fixed duration or brightness claim is assigned to the luminous material.

Rubber Strap with Internal Support

The supplied configuration includes a rubber strap incorporating an internal support structure.

The design helps the strap retain its intended shape around the wrist while maintaining the flexibility associated with rubber.

The clasp is manufactured from 904L stainless steel and incorporates a micro-adjustment system for fine changes in fit.

Technical Specifications

Specification Details
Factory B.Factory
Brand Rolex
Collection Sky-Dweller
Case Diameter 42mm
Case Thickness 13.8mm
Total Weight Approx. 187g
Exterior Material 904L Stainless Steel
Weighting Method Internal Weighted Construction
Movement 9002 Configuration
Movement Type Automatic Mechanical
Frequency 28,800 BPH / 4 Hz
Date Yes
Month Display Yes
Annual Calendar Yes
Second Time Zone Yes
Bezel Rotating Fluted Bezel
Crystal Sapphire
Lume Ice-Blue Appearance
Strap Rubber with Internal Support
Clasp 904L Stainless Steel
Clasp Adjustment Micro-Adjustment

Why the 187g Weight Matters

The approximately 187g total weight provides a measurable reference when comparing this B.Factory version with other Sky-Dweller configurations.

However, two watches weighing 187g do not necessarily provide the same wrist feel.

If additional mass is concentrated primarily in the caseback, the watch may feel more top-heavy. If the mass is incorporated throughout the case and other components, the balance can be noticeably different.

For this reason, weight, case thickness, and weight distribution should be evaluated together.

9002 Function Architecture

The movement configuration is one of the most technically significant aspects of this model.

Rather than being a basic automatic movement decorated to resemble a complicated calibre, the supplied 9002 configuration is described as supporting the watch’s principal displayed functions:

Date → Month → Annual Calendar → Second Time Zone → Bezel-Linked Adjustment

These functions are the main reason the Sky-Dweller requires a more complex dial and adjustment architecture than a conventional three-hand or GMT watch.

Annual Calendar vs. Perpetual Calendar

These two complications should not be confused.

An annual calendar is designed to distinguish between 30-day and 31-day months but requires correction for February.

A perpetual calendar, when correctly set and continuously running, additionally accounts for February and leap-year cycles.

The Sky-Dweller architecture uses an annual calendar, not a perpetual calendar.

Weighted Version Characteristics

The main supplied identifiers of this B.Factory configuration are:

42mm diameter
13.8mm thickness
Approximately 187g total weight
904L stainless steel exterior
Internal weighted construction
9002 automatic movement configuration
28,800 BPH frequency
Annual calendar
Month and date displays
GMT / second time zone
Rotating functional fluted bezel

These specifications provide clearer comparison points than subjective descriptions such as “best,” “closest,” or “highest version.”

Wearing and Adjustment

At approximately 187g, this is a relatively substantial watch, particularly when combined with its 42mm diameter.

Because the rotating bezel forms part of the function-selection system, calendar and time-zone adjustments should be performed according to the movement’s intended operating sequence.

Avoid forcing the bezel, crown, or calendar mechanism if unusual resistance is encountered.

The watch should also be kept away from strong impacts and powerful magnetic fields.

No verified water-resistance rating was supplied, so intentional water exposure should be avoided unless the individual watch has first passed an appropriate pressure test.

Frequently Asked Questions

What is the size of the B.Factory Sky-Dweller?
The supplied version measures 42mm in diameter and 13.8mm in thickness.

How much does this weighted version weigh?
The supplied total weight is approximately 187g.

How is the additional weight achieved?
B.Factory describes this configuration as using a 904L stainless steel exterior with internal weighting, rather than relying primarily on an enlarged or thickened caseback.

What is the internal weighting material?
The precise alloy composition has not been provided, so it should not be assigned a specific material name without additional verification.

What movement does this version use?
It uses a 9002 automatic mechanical movement configuration.

What is the movement frequency?
The supplied specification is 28,800 vibrations per hour, equivalent to 4 Hz.

Does the watch have an annual calendar?
Yes. The 9002 configuration incorporates an annual-calendar function together with date and month indications.

Is an annual calendar the same as a perpetual calendar?
No. An annual calendar handles 30- and 31-day months but still requires correction for February. A perpetual calendar additionally accounts for February and leap-year cycles.

Does it have a second time zone?
Yes. The watch incorporates a GMT / second-time-zone display.

Does the fluted bezel rotate?
Yes. The fluted bezel rotates and forms part of the function-selection and adjustment system.

What crystal does it use?
The supplied configuration uses a sapphire crystal.

What type of strap is fitted?
The supplied version uses a rubber strap with an internal support structure, paired with a 904L stainless-steel clasp with micro-adjustment.

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