The Sugess S420 GMT Automatic Watch combines a 40mm 316L stainless steel case with a dedicated GMT display, sapphire crystal, 24-hour ceramic bezel and multi-link stainless steel bracelet. At only 12mm thick, it keeps the proportions relatively compact while providing a second-time-zone display and strong sports-watch styling.
Inside is the Dandong Peacock SL3032 automatic GMT movement. The black dial uses large luminous hour markers, a separate GMT hand and a magnified date window at 3 o’clock, while the 24-hour bezel is available in several color combinations.
| Specification | Details |
|---|---|
| Brand | Sugess |
| Model | S420 |
| Movement | Dandong Peacock SL3032 |
| Movement Type | Automatic mechanical GMT |
| Functions | Hours, minutes, seconds, date, GMT |
| Case Diameter | 40mm |
| Case Thickness | 12mm |
| Case Material | 316L stainless steel |
| Crystal | Sapphire crystal with AR coating |
| Dial | Black |
| Date | 3 o’clock with magnifier |
| Bezel | 24-hour ceramic bezel |
| Bezel Function | GMT / second-time-zone reference |
| Lume | Hands, hour markers; luminous bezel on Lume Black version |
| Water Resistance | 100m |
| Bracelet | Stainless steel multi-link bracelet |
| Lug Width | 20mm |
| Clasp | Folding guide-style clasp |
| Weight | Approx. 136g |
At the center of the S420 is the Peacock SL3032 automatic mechanical movement, providing the additional GMT indication that separates this model from a standard three-hand automatic.
The central GMT hand works with the numbered 24-hour bezel, allowing another time zone to be displayed alongside local time. This makes the S420 particularly useful for travel, international work or anyone who regularly keeps track of another region.
For more models from the same manufacturer, see the Sugess Watches collection.
The S420 measures 40mm in diameter and 12mm thick, giving it balanced proportions for a GMT sports watch.
Its 316L stainless steel case combines brushed surfaces with polished detailing around the bezel and crown area. Crown guards are integrated into the right side of the case, while the signed crown adds another small branded detail.
At approximately 136g, the S420 has the substantial feel expected from a full stainless steel watch and bracelet without using an oversized case.
The dial is protected by sapphire crystal with anti-reflective coating. Sapphire provides strong scratch resistance for everyday wear, while the AR treatment helps reduce distracting reflections over the black dial.
A magnifier above the date window enlarges the calendar display at 3 o’clock.
A numbered 24-hour ceramic bezel surrounds the dial and provides the reference scale for the GMT hand.
Available combinations shown for the S420 include:
The different bezel treatments change the character of the watch substantially while retaining the same black dial and stainless steel construction.
For another automatic GMT with a ceramic bezel, the San Martin SN0116 GMT Automatic Watch uses a 39.5mm case and NH34 movement.
The Lume Black configuration is particularly distinctive because the 24-hour bezel numerals and markings illuminate along with the dial markers and hands.
In darkness, the hour plots, hands, bezel numerals and bezel triangle create a highly visible blue luminous display around almost the entire face of the watch.
This is not listed for every bezel configuration, so the fully luminous bezel should be associated specifically with the Lume Black option.
The dial follows a familiar sports-GMT arrangement with large circular and rectangular hour markers and an oversized triangle at 12 o’clock.
A separate colored GMT hand makes it easier to distinguish the second-time-zone indication from the standard hour and minute hands. The date aperture sits at 3 o’clock beneath the crystal magnifier.
The bold markers and broad hands are designed for quick reading rather than a dress-watch appearance.
The S420 is fitted with a stainless steel multi-link bracelet that combines broader brushed outer links with narrower polished center sections.
The bracelet connects to 20mm lugs and uses a folding clasp. The mix of brushed and polished surfaces complements the finishing of the case and gives the watch a more refined appearance than a basic three-link sports bracelet.
If you prefer a slightly smaller GMT design, the San Martin 38mm NH34 GMT Automatic Watch offers another stainless steel GMT format with a 38mm case.
The supplied specification for the Sugess S420 is 100 meters water resistance.
The dial artwork shown in some product images may contain different printed wording, but the product specification provided for this S420 listing states 100m, so that is the rating used for this product page.
The S420 is offered with several bezel combinations around the same core case and dial design.
The Blue/Red version provides the strongest traditional day/night color separation. Black/Blue and Black/Green give the watch a more restrained two-tone appearance, while the standard black bezel produces the most monochromatic configuration.
The Lume Black model adds the illuminated bezel treatment for buyers who prioritize nighttime visibility.
For a broader comparison of the brand’s mechanical watches, see the Sugess Watches Complete Guide.
What movement is used in the Sugess S420?
The S420 is equipped with the Dandong Peacock SL3032 automatic mechanical GMT movement.
What size is the Sugess S420?
The case measures approximately 40mm in diameter and 12mm thick.
Does the Sugess S420 have a GMT function?
Yes. It has a separate GMT hand that works with the outer 24-hour bezel to display another time zone.
Does it have sapphire crystal?
Yes. The watch is specified with sapphire crystal and AR coating.
Is the bezel ceramic?
Yes. The supplied specifications identify the 24-hour bezel as ceramic.
Does the entire bezel glow in the dark?
The supplied product information specifically identifies the Lume Black option as having a luminous bezel. Other bezel versions should not be described as fully luminous unless separately specified.
What is the water-resistance rating?
The supplied specification is 100 meters.
What is the lug width?
The S420 uses a 20mm lug width.
How much does the watch weigh?
The listed weight is approximately 136g.
What bracelet does it use?
It comes with a stainless steel multi-link bracelet and folding clasp.







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Black Blue:






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|---|---|
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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.
Your satisfaction is our #1 priority. Therefore, you can request a refund or reshipment for ordered products if:
We do not issue the refund if:
*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.
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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