OMEGA
Seamaster Diver 300m Co‑Axial Master Chronometer Stainless Steel Men’s Watch

  • 210.30.42.20.01.001
  • 42mm
  • Black Dial

£5,600

Available free next day delivery

Ring Size Circumference (mm)
I 48.0
J 48.7
K 50.0
L 51.2
M 52.5
N 53.8
O 55.1
P 56.3
Q 57.6
R 58.9
S 60.2
T 61.4
U 62.7
V 64.0
W 65.3
X 66.6
Y 67.8
Z 68.5

Please note that this is only a guide and will not take into account the style of ring. For example, if you are choosing a ring with a deep band width, you may need a larger size.

View the ring size guide

About This Piece

One of the most iconic diving watches from the brand, you can’t go wrong with this OMEGA Seamaster Diver 300m Co‑Axial Master Chronometer. This monochrome beauty features a highly legible ceramic dial for those partial to a plunge in the ocean. Plus, the open caseback means you can see the OMEGA Master Chronometer Calibre 8800 at work.

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Editor's Notes


25 years after its first release, OMEGA have bundled all of their heritage and technology into this perfect watch collection. Capturing the ocean spirit, the OMEGA Seamaster Diver 300m Co‑Axial Master Chronometer collection can withstand some of the harshest environments. But don’t just take our word for it. The Master Chronometer status says it all.

We love the intricate wave design seen on the dial and the open caseback. The ocean’s inspiration is never too far away on this OMEGA Seamaster Diver 300m Co-Axial Master Chronometer.