3C Factory Tudor Black Bay Chrono M79310N-0001 41mm Full Steel Yellow Dial

3C Factory Tudor Black Bay 39 “Bumblebee”: Lemon-Yellow Dial and 7750 Chronograph Movement

The 3C Factory Tudor Black Bay 39 “Bumblebee” features a 39mm case with an approximate thickness of 13.1mm, a matte lemon-yellow dial, and gunmetal-tone hands and hour markers. The bright dial contrasts with the darker details, while the snowflake hour hand adds a distinctive visual feature.

This version uses a 7750 automatic mechanical movement with confirmed working chronograph functionality, paired with a three-link stainless steel bracelet and a clasp with fine adjustment.

Key Specifications

Item Specification
Factory 3C Factory
Model Tudor Black Bay 39 “Bumblebee”
Case diameter 39mm
Thickness Approximately 13.1mm
Dial Matte lemon yellow
Hands and hour markers Gunmetal-tone finish
Hour hand Snowflake design
Lume Luminous coating on the hands
Movement 7750 automatic mechanical movement
Chronograph Confirmed functional
Bracelet Three-link stainless steel
Clasp Fine length adjustment

Lemon-Yellow Dial and Gunmetal-Tone Details

The matte lemon-yellow dial is this version’s most prominent visual feature. Gunmetal-tone hands, hour markers and dial markings create darker outlines against the yellow background, producing a distinct colour contrast.

Matte and glossy dials reflect light differently. Natural light, indoor lighting and camera white balance can all affect how the yellow appears. Images taken under different lighting conditions provide a more useful colour reference than a single photograph.

This combination suits those who prefer a bright dial with darker details. When assessing the finish, marker alignment, hand edges and dial printing are also worth examining alongside the colour itself.

39mm Diameter and 13.1mm Thickness

The 39mm diameter provides relatively compact proportions when viewed from above, while the approximate 13.1mm thickness gives the case a noticeable side profile. Both measurements should be considered when comparing size; diameter alone does not establish how slim a watch will feel.

Lug span, case-back shape and bracelet articulation also influence fit. On a smaller wrist, whether the lugs extend beyond the wrist and whether the bracelet curves naturally downward can be more informative than case diameter alone.

These proportions may appeal to those who prefer a smaller watch head while accepting some case height. Fit beneath a sleeve depends on cuff clearance and the watch’s position on the wrist.

7750 Automatic Movement and Working Chronograph

This version uses a 7750 automatic mechanical movement. Its chronograph function has been confirmed to work and can be used to measure elapsed time.

Chronograph operation should follow the instructions for this version. Use the start, stop and reset sequence, and stop the chronograph before resetting it.

Chronograph operation and regular timekeeping are separate aspects of performance. A working elapsed-time function does not, by itself, establish daily timekeeping accuracy. Daily rate, amplitude and beat error can be assessed through the corresponding independent QC article.

Individual timegrapher readings describe the movement under specific test conditions. They should not be interpreted as a guarantee of identical performance in every wearing position or throughout the entire power reserve.

Snowflake Hour Hand and Lume

The snowflake hour hand uses a broad geometric shape that stands out against the lemon-yellow dial. Its gunmetal-tone finish complements the darker dial details.

Luminous coating on the hands assists with reading the time in darker conditions. Brightness and duration depend on prior light intensity, exposure time and the surrounding environment. Comparisons are more meaningful when charging and photography conditions remain consistent.

Lume and water resistance are separate characteristics. Luminous hands do not establish whether a watch is suitable for swimming or diving.

Three-Link Bracelet and Adjustable Clasp

The three-link stainless steel bracelet is paired with a clasp that allows small changes to its length.

Establish the basic fit by adding or removing links, then use the clasp’s fine adjustment to refine tightness. An excessively loose bracelet can allow the watch head to move, while an overly tight fit may reduce comfort.

Fine adjustment helps accommodate changes in wrist size without repeatedly adding or removing links. After adjustment, check that the clasp closes securely and that both the watch head and clasp sit comfortably.

Frequently Asked Questions

Q1. What movement does this 3C “Bumblebee” use?

It uses a 7750 automatic mechanical movement. The designation alone should not be interpreted as confirmation of a genuine Swiss movement or used as the sole measure of quality.

Q2. Does the chronograph function work?

Yes. This version’s chronograph function has been confirmed to work and is not decorative. Follow the start, stop and reset sequence when operating it.

Q3. Why does the lemon-yellow dial look different across photographs?

Lighting, exposure, white balance and screen settings can affect colour appearance. Comparing photographs taken in natural and indoor light provides a more useful reference.

Q4. Is the 39mm case suitable for smaller wrists?

It is worth considering for those who prefer a smaller watch head. Suitability also depends on lug span, wrist shape and bracelet fit.

Q5. Do the hands have lume?

Yes. The hands have a luminous coating to assist with reading the time in darker conditions. Actual brightness and duration depend on light exposure and the environment.

Q6. How does clasp fine adjustment improve fit?

Once the basic bracelet length is established, fine adjustment allows smaller changes in tightness, helping reduce excessive movement or an overly tight fit.

Please identify the merchant when purchasing to prevent buying counterfeit 3C Factory products.

Welcome to Clean Factory Watch .We are dedicated to providing you with high-quality 1:1 replica watches that offer exceptional value at reasonable prices. Each watch is carefully photographed in real life to ensure an accurate description, allowing you to confidently choose a style that suits your taste and make an informed purchasing decision.

Please note that the listed prices do not include a watch box. If needed, it can be purchased separately. Perfectionists are advised to consider carefully before placing an order. If you have any specific requirements, feel free to contact our customer service — we’re here to help.

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