Bonest Gatti BG9960 Gravity Series Skeleton Watch — Acrylic Case, RTC-13, 45mm Tonneau
The Bonest Gatti BG9960 Gravity Series is a 45mm transparent K9 crystal acrylic tonneau skeleton automatic watch — the entire case construction is clear acrylic with 92% light transmittance, exposing the open-work dial and RTC-13 movement from all angles. Hex-screw industrial case detailing, luminous hands, fluorine rubber strap with butterfly buckle, transparent caseback and 3ATM water resistance. Available in transparent yellow, black and white with blue accents.
Key Specifications
| Specification | Detail |
|---|---|
| Model | BG9960 (Gravity Series) |
| Case diameter | 45mm |
| Case thickness | 12mm |
| Case shape | Tonneau (barrel) |
| Case material | K9 crystal polymer acrylic, 92% light transmittance |
| Movement | RTC-13 automatic (Bonest Gatti proprietary) |
| Power reserve | ~42 hours, two-way winding |
| Dial | Skeleton / open-work, no numerals |
| Luminous | Hands |
| Caseback | Transparent |
| Strap | Fluorine rubber, 25–29mm taper |
| Clasp | Butterfly buckle |
| Water resistance | 3ATM (splash-resistant) |
Variants — Three Configurations
Transparent yellow (SL-BG6005-R3): The most distinctive of the three — a yellow-tinted acrylic case with the skeleton dial and movement visible through the warm yellow transparency. Yellow acrylic creates a specific visual identity unlike any stainless steel watch.
Black (SL-BG6005-R1): Dark case acrylic — the skeleton dial elements contrast against the darker housing. The least visually radical of the three but the most wearable across everyday contexts.
White with blue accents (SL-BG6005-R2): White or light acrylic case with blue dial accents — the freshest and most contemporary combination of the three.
K9 Crystal Acrylic — 92% Light Transmittance
The BG9960’s case is constructed from K9 crystal polymer acrylic — a high-clarity plastic material, not glass or sapphire. At 92% light transmittance the K9 acrylic allows near-total light passage through the case walls, creating the transparent floating effect where the skeleton dial and movement appear suspended without a visible housing.
K9 acrylic vs optical glass (BG7702): The BG7702 Gorilla Series uses optical glass for its transparent case; the BG9960 uses K9 acrylic. Acrylic is lighter and can be cast in more complex shapes (including the yellow tint) but is softer than glass and more susceptible to surface scratching. Sapphire crystal (Mohs 9) resists scratching far better than both acrylic and glass. For a transparent case watch, minor surface scuffs will accumulate on the acrylic over time.
Hex screws: The exposed hex-style screws on the case exterior are visible as decorative structural elements — referencing industrial engineering and mechanical design language consistent with the Gravity Series name.
RTC-13 Movement
The RTC-13 is a Bonest Gatti proprietary automatic caliber — in the same proprietary family as the BTC-13 in the BG5602. The RTC-13 offers approximately 42 hours of power reserve with two-way automatic winding (the rotor winds the mainspring in both directions of rotation). The specific jewel count and beat rate are not listed in the available documentation. The movement is visible through both the skeleton dial and the transparent caseback.
Skeleton Dial — No Numerals
The BG9960 dial is numberless — no printed or applied hour numerals, only the skeleton framework and luminous hands. The time is read by the hand positions against the open-work structure. For buyers who use watches primarily for time reference, the absence of numerals creates a slightly slower time-reading experience. For buyers who wear the watch as a visual object and mechanical art piece, the uninterrupted skeleton view is the correct choice.
3ATM Water Resistance
Splash and rain protection only — not suitable for swimming or submersion. The acrylic case construction limits water resistance compared to equivalent metal-cased watches. Remove before handwashing, showering or any sustained water exposure.
BG9960 vs BG7702 — Transparent Case Comparison
Both the BG9960 Gravity and BG7702 Gorilla use transparent cases, but the construction differs:
| Feature | BG9960 Gravity | BG7702 Gorilla |
|---|---|---|
| Case material | K9 acrylic (tinted options) | Optical glass |
| Case shape | Tonneau, 45mm | Round-ish, 42mm |
| Movement | RTC-13 proprietary | Citizen auto |
| Strap | Fluorine rubber | Rubber |
| Water resistance | 3ATM | 3ATM |
Choose BG9960 for the yellow or black tinted acrylic, tonneau case and RTC-13 movement. Choose BG7702 for the optical glass case, Citizen movement and the geometric coloured dial framework.
Who Is the Bonest Gatti BG9960 For?
The BG9960 is built for:
- Transparent yellow acrylic watch buyers — a highly specific and unusual colour/material combination available on very few watches at any price
- Tonneau skeleton buyers who want the transparent case effect in a barrel rather than round format
- Lightweight statement watch buyers — acrylic cases are significantly lighter than steel or titanium at equivalent dimensions
- Gravity Series collectors who want the industrial hex-screw aesthetic and the RTC-13 proprietary movement
How It Compares
vs. Bonest Gatti BG7702 Gorilla — See comparison table above.
vs. Bonest Gatti BG5602 King Sport — Both are oversized tonneau skeleton automatics. BG5602 uses steel case, FKM strap and BTC-13; BG9960 uses acrylic case, fluorine rubber and RTC-13. Choose BG5602 for steel durability; choose BG9960 for transparency and lighter weight.
vs. Bonest Gatti BG9902 Ghost Speed — BG9902 uses steel tonneau, Citizen movement and IP68. BG9960 uses acrylic tonneau, RTC-13 and 3ATM. Choose BG9902 for better water resistance and Citizen movement; choose BG9960 for the transparent acrylic aesthetic.
More from Jewelry Addicts
- Bonest Gatti Watches — full Bonest Gatti range
- Bonest Gatti BG7702 Gorilla — optical glass transparent skeleton alternative
- Bonest Gatti BG5602 King Sport — steel tonneau skeleton alternative
- Bonest Gatti BG9902 Ghost Speed — steel tonneau with IP68
- Best Automatic Watches Under $500 — full roundup
SHIPPING
We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.
Do you ship worldwide?
Yes. We provide free shipping to over 200 countries around the world. However, there are some locations we are unable to ship to. If you happen to be located in one of those countries we will contact you.
What about customs?
We are not responsible for any custom fees once the items have been shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.
How long does shipping take?
Shipping time varies by location. These are our estimates:| Location | *Estimated Shipping Time |
|---|---|
| United States | 5-20 Business days |
| Canada, Europe | 5-20 Business days |
| Australia, New Zealand | 5-20 Business days |
| Central & South America | 5-25 Business days |
| Asia | 5-20 Business days |
| Africa | 5-25 Business days |
Do you provide tracking information?
Yes, you will receive an email once your order ships that contains your tracking information. If you haven’t received tracking info within 5 days, please contact us.
My tracking says “no information available at the moment”.
For some shipping companies, it takes 2-5 business days for the tracking information to update on the system. If your order was placed more than 5 business days ago and there is still no information on your tracking number, please contact us.
Will my items be sent in one package?
For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.
If you have any other questions, please contact us and we will do our best to help you out.
RETURNS
Order cancellation
All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.
Refunds
Your satisfaction is our #1 priority. Therefore, you can request a refund or reshipment for ordered products if:
- If you did not receive the product within the guaranteed time (45 days not including 1-3 day processing) you can request a refund or a reshipment.
- If you received the wrong item you can request a refund or a reshipment.
- If you do not want the product you’ve received you may request a refund but you must return the item at your expense and the item must be unused.
We do not issue the refund if:
- Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
- Your order did not arrive due to exceptional circumstances outside the control of jwlraddicts.com (i.e. not cleared by customs, delayed by a natural disaster).
- Other exceptional circumstances outside the control of jwlraddicts.com.
*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page
If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.
Exchanges
If for any reason you would like to exchange your product, perhaps for a different size in clothing, you must contact us first and we will guide you through the steps.
Please do not send your purchase back to us unless we authorise you to do so.
Order cancellation
All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.
Refunds
Your satisfaction is our #1 priority. Therefore, you can request a refund or reshipment for ordered products if:
- If you did not receive the product within the guaranteed time( 45 days not including 2-5 day processing) you can request a refund or a reshipment.
- If you received the wrong item you can request a refund or a reshipment.
- If you do not want the product you’ve received you may request a refund but you must return the item at your expense and the item must be unused.
We do not issue the refund if:
- Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
- Your order did not arrive due to exceptional circumstances outside the control of jwlraddicts.com (i.e. not cleared by customs, delayed by a natural disaster).
- Other exceptional circumstances outside the control of //jwlraddicts.com
*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page
If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.
Exchanges
If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.
Please do not send your purchase back to us unless we authorise you to do so.
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