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The Montblanc Iced Sea 0 Oxygen Deep 4810 (ref. MB133268) pairs a glacier-inspired blue dial with a titanium case rated by Montblanc to 4,810 metres. Its 43 mm diameter is substantial, but its 19.4 mm thickness is the dimension most likely to define how it wears. Montblanc lists it at $9,800 in the US; the rating and specifications below are manufacturer-published claims, not independent dive-test results.
What is the Montblanc Iced Sea 0 Oxygen Deep 4810?
MB133268 is a mechanical dive watch in Montblanc’s Iced Sea collection. The “0 Oxygen” designation refers to Montblanc’s claim that the case is devoid of oxygen; it is not a measure of water resistance. The brand also gives the case back a 3D engraving depicting the view divers see beneath ice. These are product-description details, not independently verified performance findings.
Its visual focal point is a blue sfumato dial patterned to evoke the Mer de Glace. Montblanc says, “Its texture was achieved using an almost-forgotten ancestral technique called gratté-boisé.” The brand’s description links the surface treatment to the watch’s glacier theme.
How thick is the Montblanc Iced Sea 0 Oxygen Deep?
Montblanc specifies a 43 mm titanium case that is 19.4 mm tall. Independent reviewer Lex Stolk of Fratello reported the same dimensions in a July 25, 2024 hands-on review. The height is considerable for a wristwatch, so the diameter alone does not tell the whole fit story: consider how far the case rises above your wrist and whether it clears your cuffs. Published dimensions cannot determine fit on an individual wrist; try it on if possible.
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Montblanc identifies titanium as the case material, but the available specifications do not state a weight. That means the material alone is not enough to establish how light or comfortable the complete watch feels on the wrist.
How deep can the Montblanc Iced Sea 0 Oxygen Deep go?
Montblanc rates the watch to 481 bar, or 4,810 metres, and says it conforms to ISO 6425 for scuba diving. Those are the manufacturer’s published specifications for MB133268, not evidence of independent testing in the sources available here. The rating is far beyond the needs of ordinary recreational diving; for a diver, it should not be read as a reason to exceed training, equipment limits, or safe dive practices.
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The watch has a unidirectional rotating bezel and a screw-down titanium crown, both listed by Montblanc. The rating is a product specification, not a recommendation to expose a watch to extreme conditions or a substitute for following the manufacturer’s care guidance.
What movement is in the Iced Sea 0 Oxygen Deep 4810?
Montblanc specifies its COSC-certified automatic Manufacture MB 29.29 movement, with hours, minutes, seconds and date. The brand describes the power reserve as approximately five days; Fratello reported 120 hours in its 2024 review. That reserve is a useful autonomy figure, but it does not by itself establish accuracy between services or long-term reliability.
How much does the Montblanc Iced Sea 0 Oxygen Deep 4810 cost?
Montblanc’s US product page displayed a price of $9,800 when accessed in 2026. Prices can change, so confirm the current listing with Montblanc before buying. Fratello’s July 2024 review reported a launch-era price of €8,900 / US$9,100; that earlier figure is not a current quote and should not be compared with the later US listing as though both were recorded at the same time.
Montblanc’s collection page includes other Iced Sea Automatic Date and Automatic Date 0 Oxygen models. Its mixed US collection listing showed prices from $4,100 to $10,300, but those are not like-for-like alternatives or a stable price range for this reference. Verify the exact model, specifications and price when comparing.
Quick Recap
Best Value
- Movement : ST2100
- Dial diameter : Approx.38mm
- Thickness : Approx.12.5mm
- Strap width: 20mm
- Mirror material : Synthetic Sapphire
Rank #4
What to weigh before choosing MB133268
- Fit: The 43 mm width and 19.4 mm height make trying it on especially useful; individual wrist fit cannot be inferred from dimensions alone.
- Design: The glacier-pattern dial, titanium case and engraved case back give the watch a distinctive visual identity. The dial-making description and oxygen-free case are Montblanc’s claims.
- Capability: The 4,810-metre rating and stated ISO 6425 conformity are striking specifications, but do not imply a practical need for that depth capacity.
- Movement: COSC certification and an approximately five-day reserve are prominent stated features; they do not establish service history or long-term reliability.
- Price: At the US listing price accessed in 2026, this is a high-priced purchase. Compare the exact reference and current regional listing rather than relying on older launch pricing or a mixed collection page.
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.
