M50 Black-Ion [44mm]

16 reviews
Our legendary M50 offers industry leading reliability, with 500M rating, scratch-proof sapphire crystal, and ultra-legible dial all in a matte black 316L stainless steel case. The M50 is trusted by military and tactical teams across North America to deliver rock-solid performance in any conditions.

New M50 trigger-release black-ion steel bracelets are available now.

Band Type: Black Stainless Steel

Black Stainless Steel
Black Hyper Rubber
Black-ion Web Nato


  • Assembled in Canada
  • Free shipping on orders over $100
  • 2 year extendable warranty
  • Free returns
  • The dive watch used by professionals
  • Trusted by military and tactical teams across North America
  • Comes standard with virtually scratch proof sapphire crystal
  • Matte black ion-plated 316L stainless steel case with 500M of water-resistance (yes, you read that right)
  • High-accuracy long-life battery quartz movement
  • Comfortable 4 o’clock screw-down crown that reduces “wrist-bite”
  • Extremely legible dial with SuperLuminova luminous
  • Movement: Japanese, Quartz, Miyota 2S60
  • Dial Color: Black
  • Crown: Screw-down crown
  • Water Resistance (m/ft) : 500 / 1650
  • Case Material: Black-Ion Plated Stainless Steel
  • Crystal: Sapphire Only
  • Case Diameter: 44mm
  • Case Height: 14.5mm
  • Lug Width: 22mm
  • Lug-to-Lug: 52mm
M50 Black-Ion [44mm]
M50 Black-Ion [44mm]
The Dive Watch Used By Professionals

The M50 has 500M of water-resistance (yes, you read that right) and is used by various military and ERTs across North America. The M50 is made from 316L stainless steel case in matte black ion plating finish and comes standard with sapphire crystal.

M50 Black-Ion [44mm]
Ultra-Legible Dial

High-contrast, luminous dials and large, clear numbers offer exceptional legibility, day or night. Read the time at a glance, without glasses.


Customer Reviews
4.9 Based on 16 Reviews
5 ★
4 ★
3 ★
2 ★
1 ★
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Barclay W.
I recommend this product

Second Momentum Watch since 2001.

I bought this M-50 Black Ion, because my night vision is slowly deteriorating at 69. I have worn a Momentum Pathfinder full lume Ti, daily, since April of 2001. My experience with that watch, and Momentum’s excellent service, are what brought me to this purchase. I have often thought that a true diving watch would be a nice addition to my collection, but couldn’t justify the cost. When my Pathfinder required a new battery and re pressure testing, I decided to get the M-50 at the same time. I’m very satisfied with it, as I can read its dial all night, with ease. I wore my Pathfinder Ti, during my career as a professional Fire Captain, and it held up perfectly to the harsh environment that entailed, plus swimming, boating, hunting, fishing, mechanicing etc. The M-50 was designed to survive in the most harsh environments, and is trusted by Professionals to keep accurate time in all of them. I’m sure that it will outlast me by decades. I bought my wife a Splash 38, as well, and we are convinced that Momentum watches are the perfect fit for our outdoors, demanding lifestyles Thank you Momentum for your excellent products and exceptional service.

Roy M.
United States United States
I recommend this product

If I had designed it.

If I had designed a watch this is exactly what it would be I really like this watch great job looks fantastic I like the magnifying glass over the day date as I'm old:-) I like the luminescent numbers and 4:00 adjustment knob. My only minor recommendation would if the luminescent lasted a bit longer at night.

Brett H.
United States United States
I recommend this product

Nice watch!

Everything about this watch seems high quality and it fits comfortably on my wrist. I really like the all black color. The dial is extremely easy to read and the lume is fantastic. I like the placement of the crown at 4 o'clock. Not a fan of the large loops on the included NATO band, but switched out with another NATO I already had, just personal preference. Deducted one star only because I am disappointed that two small spots of black paint have already chipped off the rotating bezel, exposing bare metal. I am now worried that this will continue to happen as it takes away from the appearance of the watch in my opinion and I was hoping for better durability. Overall, this is the only issue I have encountered and I have been happy otherwise.

Mark F.
United States United States
I recommend this product

Déjà vu all over again

I purchased my original M50 over a decade age and it provided me with outstanding service. When I discovered the Ion Black model I decided it was time to own another M50, it looks great and I’m looking forward to it giving me the same outstanding service as my original.

C S.

Amazing watch at its price point!

Very happy about my M50 black ion purchase, it's truly an amazing watch - the value is hard to beat, if not impossible! Nice heft/weight without feeling like a wrist-brick, good legibility to the numerals and face, very pleasing overall. Nitpicks - my wrist diameter is nearly 8 inches so the included NATO strap was too short, I had to use the factory NATO strap on the next-to-last setting, so I removed that original strap and installed a Barton canvas long-length strap and that is perfect. Also, the M50 black ion face is a bit plain - I would love the Momentum logo just under the 12 o'clock marker and all the other text below the logo. Rock that logo, Momentum! If it's as tough as it seems and the battery lasts almost 10 years, then I'd probably give it 6 out of 5 stars. Keep up the good work, Momentum.