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Omega Seamaster Planet Ocean Ultra Deep in O-MEGASTEEL: Reference 215.30.46.21.03.001

The blue-dial O-MEGASTEEL Ultra Deep, reference 215.30.46.21.03.001, pairs a 45.5 mm case with calibre 8912 and a stated 6,000 m water-resistance rating.
Estimate2–3 min Catalogued SpecialistWatchRanker Team
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The blue-dial O-MEGASTEEL version of the OMEGA Seamaster Planet Ocean Ultra Deep 6000M is reference 215.30.46.21.03.001. It pairs a 45.5 mm case and matching bracelet with automatic calibre 8912, a 60-hour power reserve and a stated water-resistance rating of 600 bar (6,000 m / 20,000 ft). Those specifications describe a substantial professional-style dive watch; the exact reference matters because OMEGA lists other O-MEGASTEEL Ultra Deep configurations.

What is the O-MEGASTEEL Ultra Deep?

It is an O-MEGASTEEL version of OMEGA’s Seamaster Planet Ocean Ultra Deep 6000M. The specific example covered here is the blue-dial, bracelet-equipped reference 215.30.46.21.03.001. OMEGA’s catalog also includes other O-MEGASTEEL Ultra Deep references, so dial and bracelet or strap details should be checked against the reference number rather than assumed from the model name alone. OMEGA product listing · OMEGA Ultra Deep catalog

Specifications for reference 215.30.46.21.03.001

The following figures are OMEGA’s published specifications for this reference on its Taiwan product page.

Specification Published detail
Case diameter 45.5 mm
Lug-to-lug 51.90 mm
Thickness 18.12 mm
Lug width 22 mm
Case and bracelet O-MEGASTEEL
Dial Blue
Crystal Domed, scratch-resistant sapphire with anti-reflective treatment on both sides
Movement Automatic calibre 8912
Power reserve 60 hours
Water resistance 600 bar (6,000 m / 20,000 ft)

Source for the table: OMEGA Taiwan listing for reference 215.30.46.21.03.001. A retailer listing for the same reference also reports the main dimensions, materials, rating, calibre and reserve. Chrono24 listing

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#1 Best Overall
Sale
Omega Seamaster Planet Ocean Automatic Men's Watch 215.30.44.21.03.001
  • Blue Dial with Arabic Numeral and Index Hour Markers, Minute Track, Date Window, Luminescent Hands and Hour Markers
  • Stainless Steel Case and Bracelet, Case Diameter: 43.5mm
  • Anti-Magnetic, Resistant to Magnetic Fields Reaching 15,000 Gauss
  • Self-winding Automatic Chronometer Movement, COSC Chronometer Certified and Co-Axial Escapement
  • Scratch Resistant Sapphire Crystal with Anti-reflective Treatment, Exhibition Case Back

What O-MEGASTEEL means

OMEGA describes O-MEGASTEEL as a high-performance stainless-steel alloy produced through a pressure electro-slag remelting process. The brand says it has no nickel, increased nitrogen and manganese, a brighter appearance, non-magnetic character and corrosion resistance. These are manufacturer claims, not independent laboratory findings in the cited material.

OMEGA also states that O-MEGASTEEL is 40–50% harder than traditional steel. That comparison is OMEGA’s undated product-page claim, accessed in 2026; the cited source does not provide an independent test method or comparison. OMEGA’s material description

How to interpret the 6,000 m rating

OMEGA publishes the reference’s water resistance as 600 bar (6,000 m / 20,000 ft). This is the product’s stated rating. It should not be read as a substitute for dive planning, a depth gauge or other appropriate instruments.

OMEGA’s page for the related O-MEGASTEEL reference 215.30.46.21.03.002 says that model was tested to conform to ISO 6425:2018 for saturation-diving performance. Keep that statement tied to the .002 reference and its product page; it does not establish the same certification claim for .001. OMEGA listing for reference 215.30.46.21.03.002

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Rank #3
Omega Seamaster Planet Ocean 600 M Automatic Black Dial Men's Watch 215.30.40.20.01.001
  • Brand New Omega Seamaster Planet Ocean Men's Watch
  • Self Winding Automatic Master Chronometer Movement
  • Omega Caliber 8800
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How to compare O-MEGASTEEL Ultra Deep variants

OMEGA lists multiple O-MEGASTEEL Ultra Deep references. Compare the actual configuration rather than treating all versions as interchangeable.

  • Reference and dial: confirm the full reference number and dial color.
  • Bracelet or strap: check the supplied attachment and clasp configuration.
  • Case dimensions: compare diameter, thickness and lug-to-lug where the exact listing states them. For .001, OMEGA lists 45.5 mm, 18.12 mm and 51.90 mm respectively.
  • Movement and rating: verify the movement and water-resistance details on the page for that specific reference.

The listed dimensions provide useful figures for a fit comparison, but diameter alone cannot predict how a watch will wear on an individual wrist. The available cited material contains no comparative wrist-fit testing. The official catalog is the place to identify the listed O-MEGASTEEL configurations: OMEGA Ultra Deep catalog

Quick Recap

SaleBestseller No. 1
Omega Seamaster Planet Ocean Automatic Men's Watch 215.30.44.21.03.001
Omega Seamaster Planet Ocean Automatic Men's Watch 215.30.44.21.03.001
Stainless Steel Case and Bracelet, Case Diameter: 43.5mm; Anti-Magnetic, Resistant to Magnetic Fields Reaching 15,000 Gauss
$6,380.00
Bestseller No. 3
Omega Seamaster Planet Ocean 600 M Automatic Black Dial Men's Watch 215.30.40.20.01.001
Omega Seamaster Planet Ocean 600 M Automatic Black Dial Men's Watch 215.30.40.20.01.001
Brand New Omega Seamaster Planet Ocean Men's Watch; Self Winding Automatic Master Chronometer Movement
$6,740.00
Bestseller No. 4
Omega Seamaster Planet Ocean Automatic Men's Watch 215.30.44.21.01.002
Omega Seamaster Planet Ocean Automatic Men's Watch 215.30.44.21.01.002
Omega Seamaster Planet Ocean Automatic Men's Watch 215.30.44.21.01.002
$6,099.99
Bestseller No. 5
Omega Seamaster Planet Ocean Automatic Men's Watch 215.33.44.22.01.001
Omega Seamaster Planet Ocean Automatic Men's Watch 215.33.44.22.01.001
Omega Seamaster Planet Ocean Automatic Men's Watch 215.33.44.22.01.001
$8,249.99
Best Value
Omega Seamaster Planet Ocean Automatic Men's Watch 215.33.44.22.01.001
  • Omega Seamaster Planet Ocean Automatic Men's Watch 215.33.44.22.01.001
Rank #4
Omega Seamaster Planet Ocean Automatic Men's Watch 215.30.44.21.01.002
  • Omega Seamaster Planet Ocean Automatic Men's Watch 215.30.44.21.01.002

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

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