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:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
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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Anthony Honny
Fort Morgan, US
★★★★★ 4
Boys linen suit
Size: 10, Color: Light Blue
Looks great. Just wish it included a shirt
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Reviewed in the United States on March 21, 2026
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Denise
West Palm Beach, US
★★★★★ 5
Great product
Size: 10, Color: Light Champagne, Size: 10, Color: Light Champagne
Not bring the tshirts but fit really good
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Reviewed in the United States on August 10, 2025
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Tania S
New York, US
★★★★★ 5
Very comfortable
Size: 14, Color: Light Green
I received so many compliments on my son’s outfit for graduation. 
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Reviewed in the United States on June 26, 2025
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Heissel S.
Port Orchard, US
★★★★★ 1
no pure white.
no pure white.
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Reviewed in the United States on February 4, 2026
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fnlhalas
Chelsea, US
★★★★★ 5
suit
Size: 12, Color: Beige
Very nice suit set. size 12. seems to fit as expected. I love the quality. It does have multi colored thread, as it is not solid.
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Reviewed in the United States on June 21, 2025

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