Is the Seamaster Diver 300M worth it?

It is a strong choice if you want a certified dive watch with a Master Chronometer movement. At $5,450 at WatchMaxx.com as of November 3, 2026, it sits at the low end of its recent range.

How does it compare with the previous Seamaster 300M?

This generation adds the Master Chronometer caliber 8800, 15,000-gauss magnetic resistance and a ceramic dial. The older model uses an earlier movement without METAS certification.

What is the power reserve?

About 55 hours on a full wind. That covers a weekend off the wrist without resetting.

Will the 42 mm case fit my wrist?

It suits wrists roughly 6.5 inches and up. Try it on if you are near that size, since the steel bracelet adds bulk.

Yes. Omega rates it resistant to magnetic fields above 15,000 gauss, verified under METAS testing.

The lowest recent price was $5,450 on November 4, 2026. Watch the price history before buying.

Omega Seamaster Diver 300M Co-Axial Master Chronometer 42 mm: lowest price $5,450.00 at WatchMaxx.com, 4 stores compared

Q: Where is the Omega Seamaster Diver 300M Co-Axial Master Chronometer 42 mm cheapest?

At WatchMaxx.com, for $5,450.00, as of our latest check.

Q: What do buyers say about the Omega Seamaster Diver 300M Co-Axial Master Chronometer 42 mm?

Rated 5 out of 5 from 5 ratings.

Q: Where can I buy the Omega Seamaster Diver 300M Co-Axial Master Chronometer 42 mm?

4 stores we checked sell it, including PrestigeTime.com, WatchMaxx.com, eBay, Amazon.

What reviewers say

Owners rate it highly, with a 5 out of 5 average from 5 ratings. Praise centers on build quality, the ceramic dial and accuracy.

Pros

Solid build and finish
Attractive wave dial
Accurate, anti-magnetic movement
Comfortable steel bracelet

Cons

Heavier than expected
Bracelet sizing needs a tool

From PrestigeTime.com

Brushed stainless steel case with polished beveled corners
Stainless steel bezel with polished black ceramic fill and white enamel diving scale
High gloss black zirconium oxide ceramic dial with laser engraved wave design
Omega Master Co-Axial caliber 8800 automatic movement, 25,200 vph, 35 jewels, ~55 hour power reserve
METAS Certified Master-Chronometer; anti-magnetic to 15,000 gauss
Water resistance 300m/1000ft; helium escape valve at 10 o'clock

Materials: Stainless steel case; black ceramic bezel fill; zirconium oxide ceramic dial; scratch resistant sapphire crystal
Fit: Mens 42mm
Guarantee: Prestige Time 5 Year Warranty from date of sale, covering manufacturing defects and battery replacement; excludes finishes, crystal damage, straps, wear and tea
Returns: U.S. customers: 14 day return policy from day of receipt, subject to a 2% restocking fee (waived for exchange of equal or close to equal value); special order w
Shipping: Free FedEx Standard (3 business days) shipping within the USA; all packages fully insured with Adult Signature required; Alaska, Puerto Rico and Hawaii charged
In the box: Watch in the original box with original serial numbers intact

About the Omega Seamaster Diver 300M Co-Axial Master Chronometer 42 mm

Brushed stainless steel case with polished beveled corners. Polished stainless steel crowns. Helium escape valve located on the case edge at the 10 oclock position. Bezel: Stainless steel with polished black ceramic fill. White enamel diving scale. Luminous dot at the starting point (green colored emission). Dial: High gloss black zirconium oxide ceramic dial, [ZrO2] engraved on the dial directly below the center hands. Laser engraved wave design. Applied polished hour markers with luminous fill. Fine printed minute/seconds track. Skeltonized hour & minute hands. Polished hands with luminous tips. Red tipped seconds hand. Date window located at the 6 oclock position. Movement: Omega Master Co-Axial caliber 8800, beats at 25,200 vph, contains 35 jewels & has an approximate power reserve of 55 hours. METAS Certified Master-Chronometer: The assembled watch, with its COSC certified Chronometer movement, passes rigorous tests that replicate real-life conditions. The METAS certification tests water resistance, precision and magnetic resistance to 15,000 gauss. Anti-magnetic: resistant to magnetic fields greater than 15,000 gauss. Features Omegas Si14 silicon balance spring. Features Omegas Co-Axial Escapement. The rotor & visible bridges are decorated with a unique arabesque wave design finish.