HANBORO 851 Double Flywheel Automatic Watch – Shanghai JH515, Sapphire, Crystal Bezel, 50M
The HANBORO 851 is a 43mm skeleton automatic watch with a double flywheel dial — two visible oscillating flywheel sections positioned side by side near 6 o’clock, set against a honeycomb cutout background with a star-shaped centre bridge in multi-colour accents. Shanghai JH515 automatic movement, 21 jewels, 21,600 vph, 40-hour power reserve. Sapphire mirror crystal. 316L stainless steel case with a 60-piece crystal-set bezel. Genuine leather strap. Luminous hands and markers. 13.5mm thick, 119g, 50M water resistance. Available in black and blue colour variants.
Key Specifications
| Specification | Details |
|---|---|
| Brand | HANBORO |
| Model | 851-2 |
| Movement | Shanghai JH515 automatic |
| Jewels | 21 |
| Frequency | 21,600 vph |
| Power reserve | ~40 hours |
| Case material | 316L stainless steel |
| Crystal | Sapphire mirror |
| Bezel | 60-piece crystal-set |
| Dial style | Skeleton, double flywheel |
| Case diameter | 43mm |
| Case thickness | 13.5mm |
| Strap material | Genuine leather |
| Strap width | 27mm–20mm (tapered) |
| Water resistance | 50M / 5ATM |
| Weight | 119g |
| Variants | Black strap/dial, blue strap/dial |
Double Flywheel Skeleton Dial
The defining feature of the 851 is its double flywheel display — two separate oscillating flywheel-style elements positioned side by side at the lower portion of the dial, near 6 o’clock. This is distinct from a single balance wheel display found on most skeleton watches; the dual flywheel arrangement adds a second point of visible mechanical motion to the dial, increasing the sense of mechanical activity and depth.
The remainder of the dial uses a honeycomb cutout background behind the hands, with a star-shaped centre bridge carrying multi-colour accents. This sporty, supercar-inspired aesthetic is reinforced by sharp case lines and the crystal bezel surrounding the dial.
Shanghai JH515 Movement
The 851 runs a Shanghai JH515 automatic mechanical movement — manufactured by Shanghai Watch Factory, one of China’s oldest and most established watch movement producers with over 60 years of manufacturing history. 21 jewels, 21,600 vph, approximately 40-hour power reserve. Self-winding through wrist motion; no battery required. As with any automatic movement, regular daily wear maintains the power reserve; if unworn for an extended period, manual winding via the crown will restore timekeeping.
Sapphire Mirror Crystal
The front crystal is sapphire — providing a clear view through to the layered double flywheel dial detail and meaningful scratch resistance for long-term daily wear, a material upgrade over mineral or Hardlex glass.
60-Piece Crystal Bezel
The outer bezel is set with 60 individual crystal pieces arranged around the case perimeter, adding a textured, detailed visual layer that frames the mechanical dial. These are decorative crystal elements, not diamonds.
Case and Strap
316L stainless steel case with a combination of polished and brushed surfaces, 43mm diameter, 13.5mm thick. The crown carries a logo detail, with a blue accent crown on the blue colour variant. Genuine leather strap tapering from 27mm at the case to 20mm at the buckle. Total weight 119g.
50M Water Resistance
Rated 50M / 5ATM — suitable for splash exposure, rain, handwashing, cold bathing, and swimming. Not rated for snorkelling or diving. Keep the crown closed during water exposure.
Colour Variants
Black (Men’s Watches 1) — black strap with black dial accents against a silver case. The most cohesive monochrome presentation.
Blue (Men’s Watches 2) — blue strap with blue dial accents, silver case, and a matching blue crown detail. The most distinctive colour combination in the range.
How the 851 Compares to Other HANBORO Models
The 851 is one of several skeleton and mechanical-themed watches in the HANBORO range on this site. For a different dual-mechanism display, see the HANBORO King Bee Series 2003 — honeycomb-inspired skeleton dial with a centre flywheel and calendar/24-hour sub-dials, silicone strap, 5ATM. For a genuinely interactive feature, see the HANBORO Roulette Automatic Watch — Miyota 8215 movement with a pusher-activated spinning roulette wheel. For a more traditional dress watch with a nautical theme, see the HANBORO Sailing Series — 3D textured ship dial, day-date display, leather or steel strap.
FAQ
What movement does the 851 use? A Shanghai JH515 automatic mechanical movement, manufactured by Shanghai Watch Factory — a long-established Chinese movement maker. 21 jewels, 21,600 vph, approximately 40-hour power reserve.
What is the double flywheel feature? Two separate oscillating flywheel-style sections positioned side by side near 6 o’clock on the dial, both visible as the movement runs. This differs from the single balance wheel display found on most skeleton watches.
Is the crystal sapphire? Yes — sapphire mirror, providing scratch resistance and clarity for viewing the dial detail.
Are the bezel crystals diamonds? No — the 60-piece bezel is set with decorative crystal elements, not diamonds.
Is it waterproof for swimming? Yes — rated 50M / 5ATM, suitable for cold bathing and swimming. Not rated for snorkelling or diving.
What size is the case? 43mm diameter, 13.5mm thick, 119g — a substantial wrist presence consistent with the sporty, mechanical design theme.
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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