MWC 100ATM / 3,280ft / 1000m Water Resistant Diver's Watch  Stainless Steel Case with Helium Valve and Matching Bracelet  100% Swiss Made with Sellita SW200 26-Jewel Automatic Movement
SKU: 7534318558

MWC 100ATM / 3,280ft / 1000m Water Resistant Diver's Watch Stainless Steel Case with Helium Valve and Matching Bracelet 100% Swiss Made with Sellita SW200 26-Jewel Automatic Movement

Sale price$576.45 Regular price$640.50
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Description

MWC 100ATM / 3,280ft / 1000m Water Resistant Diver's Watch Stainless Steel Case with Helium Valve and Matching Bracelet 100% Swiss Made with Sellita SW200 26-Jewel Automatic MovementSKU: 100AT SS BB 200 MWC "Depthmaster" 100ATM Military Diver Watch Introducing the MWC "Depthmaster" 100ATM Military Diver Watch, one of our latest and most robust models. This 100% Swiss made diver's watch is designed to endure extreme conditions, featuring a sapphire crystal and a 100ATM (1,000 meters 3,280 feet) water resistance rating. It is suitable for diving with mixed gases at extreme depths and includes a wider 24mm bracelet and a non scratch

SKU: 100AT/SS/BB/200

MWC "Depthmaster" 100ATM Military Diver Watch

Introducing the MWC "Depthmaster" 100ATM Military Diver Watch, one of our latest and most robust models. This 100% Swiss-made diver's watch is designed to endure extreme conditions, featuring a sapphire crystal and a 100ATM (1,000 meters / 3,280 feet) water resistance rating. It is suitable for diving with mixed gases at extreme depths and includes a wider 24mm bracelet and a non-scratch ceramic bezel, making it easier to grip in extreme cold. These watches are specifically crafted for professional divers facing very challenging conditions.

Helium Escape Valve

All MWC 100ATM models come equipped with a helium escape valve. This feature addresses the issue of helium molecules entering the watch. Helium molecules are extremely small, allowing them to penetrate the watch seals even when other gases and water cannot. This can occur in saturation diving, where divers spend extended periods at great depths under high pressure.

Helium buildup inside the watch can create internal pressure, potentially causing serious damage or even blowing out the crystal or crown when unscrewed. This is particularly dangerous during time checks or resets. The helium escape valve automatically releases these molecules during decompression, ensuring the watch returns to normal sea level pressure without letting any external elements in.

Importance of Helium in Deep Diving

Helium is crucial for deep-sea diving because it does not cause nitrogen narcosis, unlike nitrogen. Helium replaces nitrogen in most deep-sea mixed gas diving applications. Professional divers working at great depths for extended periods often live in dry environments pressurized with an oxygen/helium mix. Upon surfacing and decompressing, this gas must be safely removed to avoid potentially hazardous situations like the crystal or crown being blown out, which could cause injury.

Specifications

  • Movement: High-quality Sellita SW200, 28,800 bph, 26 Jewels, 38-hour power reserve with hacking function
  • Water Resistance: 100ATM / 3,280ft / 1,000m
  • Crown: Screwdown locking
  • Helium Escape Valve: Yes
  • Dimensions:
    • Width: 45mm
    • Thickness: 15.8mm
  • Bezel Type: Unidirectional Non-Reflective with Ceramic Insert
  • Crystal Type: Sapphire with Anti-Reflective Coating*
  • Case: 316L Stainless Steel
  • Illumination: Super Luminova on markers, hands, and bezel
  • Bracelet: 24mm  stainless steel

Benefits of Sapphire Crystal

Synthetic sapphire is the best material for watch crystals due to its exceptional strength and resistance to shattering and scratching. These properties make it highly appealing to military and security personnel, police officers, and individuals with active outdoor lifestyles, accounting for over 70% of our customers. In comparison, over 90% of cracked crystal incidents involve watches with mineral glass crystals. Even hardened mineral crystals cannot match the durability of sapphire under adverse conditions.

Sapphire crystals are heat-treated to remove internal stresses, enhancing their strength. They are made with two layers of anti-reflective coating. Interestingly, sapphire crystal is now also used in the latest iPhone models. While sapphire crystal is more expensive, it is typically found in higher-end watches due to its superior qualities.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 7534318558

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Verified Purchase
Westley
Battle Creek, US
★★★★★ 4
Good job .
Size: 500 A
Product is working as it should so far .
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 19, 2026
R
Verified Purchase
Robert N Atlanta
Whiting, US
★★★★★ 5
Good little party speaker!
Style: X3206 with One Woofer
For the price, this thing is amazing! Let me cite pros and cons: Con - On battery, the bass is not very good and overall volume is not very loud. However, if you have to run on battery for a small group, it is definitely "loud enough" for a group. Such as background music for an outdoor dinner party, or cocktail party. Pro- Plugged in, the power and bass is impressive! MUCH Better than I expected. Connected it to my laptop for karaoke and it is definitely plenty loud for any house party, or plugged in, loud enough for any backyard party! ALSO - the lights that are included are pretty cool. And, it has a variety of input connectors for just about any application. Again, in this price range, it is a hit!
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Reviewed in the United States on October 1, 2025
D
Verified Purchase
Deborah E. Hall
Battle Creek, US
★★★★★ 5
Big controllable sound! Buy it
Style: X3206 with One Woofer
Just buy this! It will not disappoint. I bought it for a family reunion gathering in a 5000 square-foot backyard garden. There were multiple seating stations all around and it could be heard from any location without being turned up all the way. Even at the halfway point it is extremely loud. I love that it is waterproof Because I left it outside overnight when the sprinklers came on and it was just fine. The battery charge lasted for five or six hours. It doesn’t take long at all to recharge. It has a good weight to it so it’s not going to blow away, but it’s not too heavy to move around. I use it in the garage. I use it while cleaning. I use it on campsites. It is a fantastic speaker. It is a little large, but not too large that it’s not manageable. I only say that because I have a BOSE small Bluetooth speaker and if you’re used to that small size, this obviously is larger. I have no Bluetooth connection issues with it at all. It plays my Amazon prime music from my phone library perfectly. I would absolutely buy one again. While my BOSE Bluetooth speaker is great, I needed it as an extra boost for a DJ party atmosphere and this did the trick. Here’s a tip, create a playlist on your phone for hours of streaming music or go to YouTube and save your favorite music videos of live music DJs and you have your very own DJ all night.
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Reviewed in the United States on January 15, 2026
E
Verified Purchase
Eric L.
Houston, US
★★★★★ 5
Great quality and price. Excellent value.
Style: X5206 with Two Woofers
Sounds great loud
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Reviewed in the United States on May 19, 2026
M
Verified Purchase
Monchy
Birmingham, US
★★★★★ 5
Best karaoke speaker!
Style: X3206 with One Woofer, Style: X3206 with One Woofer
I was looking to buy a karaoke speaker and all were underpowered or overpriced. This went on sale ~100 and for that price it is THE perfect karaoke speaker. It has dual mic inputs for duets, (4) voice effects, voice echo. Each mic had it's own volume adjustment, there's also adjustment for echo, bass and treble. These are all knobs which i like a lot. The volume is push button which i don't like and would have preferred a knob also . Still, it's a lot of fun for karaoke! What I Iike a lot is the line out. Why? If I feel it needs more power, I can connect to any other speaker with a 3.5mm input. To me this is better than TWS systems that only pair with the same model(s). Speaking of power, it is ok for the size and price. It will sound good indoors at your home or backyard. It may not be the best for a larger hall. But it does have that line-out jack that will let you connect to (almost) any other speaker you want. What I have found lacking so far is the battery life. Fully charged, it was used over BT connection for music at ~50% volume for maybe 1.5 hours with lights and for podcasts at ~15% volume, no lights for 6 .5 hours before it died. So the 14 hour claim must be an exaggeration or only under very specific conditions. Also, bass is adequate, but it's not a 'booming' bass but you can tell it's there. Overall volume is good but will also depend on the device connected.
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Reviewed in the United States on October 31, 2022

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