DIVER 300M CO‑AXIAL MASTER CHRONOMETER 42 MM-21
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Estimated Delivery:Oct 13 - Oct 17
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Free Shipping & Returns: On all Orders

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Since 1993, the Seamaster Professional Diver 300M has enjoyed a legendary following. Today’s modern collection has embraced that famous ocean heritage and updated it with OMEGA’s best innovation and design.
This 42 mm model is crafted from stainless steel and 18K yellow gold, and includes a black ceramic bezel with a Ceragold™ diving scale. The dial is also polished black ceramic and features laser-engraved waves and a date window at 6 o’clock.
The skeleton hands and raised indexes are 18K yellow gold and are filled with white Super-LumiNova, while the helium escape valve has been given a conical design.
The watch is presented on a black rubber strap and is driven by the OMEGA Master Chronometer Calibre 8800, which can be seen through the sapphire-crystal on the wave-edged caseback.
SEAMASTER
Reference: 210.22.42.20.01.001
MOVEMENT
Calibre: Omega 8800
Self-winding movement with Co-Axial escapement.
Certified Master Chronometer, approved by METAS,
resistant to magnetic fields reaching 15,000 gauss. Free
sprung-balance with silicon balance spring, automatic
winding in both directions. Rhodium plated finish with
Geneva waves in arabesque.
Power reserve: 55 hours
CRYSTAL
Domed scratch-resistant sapphire crystal with antireflective treatment on both sides
WATER RESISTANCE
30 bar (300 metres / 1000 feet)
WATCH CASE & DIAL
Case: Steel - yellow gold
Case Diameter: 42 mm
Between lugs: 20 mm
Thickness: 13.6 mm
Dial Colour: Black
Total product weight (Approx.): 116 g
STRAP
Strap type: Rubber strap
Strap color: Black
Strap surface: Rubber
Strap underside: Rubber
Buckle type: Pin buckle
Buckle material: Stainless steel
FEATURES
Anti-magnetic, chronometer, date, master
chronometer certified, helium escape valve, screwin crown, transparent case back, unidirectional
rotating bezel
We offer free worldwide shipping!
We want you to be 100% satisfied with your purchase. Items can be returned or exchanged within 30 days of delivery.
Discover more in our FAQ
How long does it take to process an order?
All the details you love about the original—with a fresh flared block heel and modern square toe. Expertly crafted using soft Nappa leather, this essential style molds and moves with you to keep you comfortably on your feet all day (and night). This boot uses leather sourced from a Leather Working Group-approved trader. The Leather Working Group (LWG) Audit Standards provide transparency and accountability within the leather supply chain—covering energy and water usage.
Do you ship internationally?
All the details you love about the original—with a fresh flared block heel and modern square toe. Expertly crafted using soft Nappa leather, this essential style molds and moves with you to keep you comfortably on your feet all day (and night). This boot uses leather sourced from a Leather Working Group-approved trader. The Leather Working Group (LWG) Audit Standards provide transparency and accountability within the leather supply chain—covering energy and water usage.
What is your return policy?
All the details you love about the original—with a fresh flared block heel and modern square toe. Expertly crafted using soft Nappa leather, this essential style molds and moves with you to keep you comfortably on your feet all day (and night). This boot uses leather sourced from a Leather Working Group-approved trader. The Leather Working Group (LWG) Audit Standards provide transparency and accountability within the leather supply chain—covering energy and water usage.
What are your sizing options?
All the details you love about the original—with a fresh flared block heel and modern square toe. Expertly crafted using soft Nappa leather, this essential style molds and moves with you to keep you comfortably on your feet all day (and night). This boot uses leather sourced from a Leather Working Group-approved trader. The Leather Working Group (LWG) Audit Standards provide transparency and accountability within the leather supply chain—covering energy and water usage.