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

  • 210.30.42.20.03.001
  • 42mm
  • Blue 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

The rich blue hues of the ceramic dial and bezel on this OMEGA Seamaster Diver 300m Co‑Axial Master Chronometer are reminiscent of the Seamaster’s inspiration, the ocean. Inside? The OMEGA Master Chronometer Calibre 8800 can be found at the heart of this timepiece.

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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 collection’s iconic wave patterns seen on the dial. Plus you can watch the Master (Chronometer Calibre 8800) at work through the transparent wave-edged caseback.