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O Seamaster Ref# 210.30.42.20.03.001

$1,020.00 $349.00

O Seamaster Diver 300M – Co-Axial Master Chronometer 42 mmStainless Steel – Blue Ceramic Bezel – Wave Pattern Dial 🔹 OverviewBorn of the ocean. Worn by legends. Engineered for those who lead. The O Seamaster Diver 300M is not simply a tool watch — it is a declaration of strength...

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Dresses Size Chart

Dress Size Chart (Inch)
DRESSES
SIZE IN INCHES
SIZE US / CAN BUST WAIST HIPS
XS 0 31"-32" 24"-25" 34"-35"
S 2-4 33"-34" 26"-27" 36"-37"
M 6-8 35"-36" 28"-29" 38"-39"
L 10-12 37"-39" 30"-32" 40"-42"
XL 14 40"-42" 33"-35" 43"-45"
Dress Size Chart (cm)
DRESSES
SIZE IN CM
SIZE US / CAN BUST WAIST HIPS
XS 0 78.7-81.2 60.9-63.5 86.3-88.9
S 2-4 83.8-86.3 66-68.5 91.4-93.9
M 6-8 88.9-91.4 71.1-73.6 96.5-99
L 10-12 93.9-99 76.2-81.2 101.6-106.6
XL 14 101.6-106.6 81.2-88.9 109.2-114.3

Swimwear Size Chart

Dress Size Chart (Inch)
SWIMWEAR
SIZE IN INCHES
SIZE US / CAN BUST WAIST HIPS
XS 0 31"-32" 24"-25" 33"-34"
S 2 33"-34" 26"-27" 35"-37"
M 4 35"-36" 28"-29" 37"-38"
L 6 37"-39" 30"-32" 39"-41"
XL 8 40"-42" 33"-35" 42"-44"

Shoes Size Chart

US EURO UK AUS JAPAN CHINA
5 35-36 3 3.5 21.5 35
5.5 36 3.5 4 22 35.5
6 36-37 4 4.5 22.5 36
6.5 37 4.5 5 23 36.5
7 37-38 5 5.5 23.5 37
7.5 38 5.5 6 24 37.5
8 38-39 6 6.5 24.5 38
8.5 39 6.5 7 25 38.5
9 39-40 7 7.5 25.5 39
9.5 40 7.5 8 26 39.5
10 40-41 8 8.5 26.5 40
11 41-42 9 9.5 27.5 41

Delivery

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    Always free shipping for orders over US $250.

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    Customer is responsible for shipping charges when making returns and shipping/handling fees of original purchase is non-refundable.

    All sale items are final purchases.

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O Seamaster Diver 300M – Co-Axial Master Chronometer 42 mm
Stainless Steel – Blue Ceramic Bezel – Wave Pattern Dial

🔹 Overview
Born of the ocean. Worn by legends. Engineered for those who lead. The O Seamaster Diver 300M is not simply a tool watch — it is a declaration of strength beneath the surface and elegance above it. Since 1993, it has symbolized bold exploration, precision, and timeless design.

💎 Key Features

  • Case: 42 mm stainless steel, brushed & polished for balance between endurance and elegance

  • Bezel: Unidirectional rotating in polished blue ceramic with white enamel diving scale

  • Dial: Blue ceramic, sun-brushed and laser-engraved with signature wave pattern; skeletonized hands and raised indexes with Super-LumiNova for superior legibility

  • Crystal: Scratch-resistant sapphire, anti-reflective treatment

  • Bracelet: Integrated stainless steel with folding clasp and diver’s extension for adaptive comfort

  • Water Resistance: 300 m / 1000 ft (professional diver’s grade)

Movement

  • Caliber: O Co-Axial Master Chronometer Calibre 8800

  • Certification: METAS Master Chronometer

  • Magnetic Resistance: Up to 15,000 gauss

  • Power Reserve: ~55 hours

  • Type: Self-winding with Co-Axial escapement

  • Functions: Hours, minutes, central seconds, date

Highlight Summary
The Seamaster Diver 300M combines heritage and innovation with a professional diver’s soul:

  • Robust 42 mm stainless steel case for strength and presence

  • Iconic blue ceramic bezel & wave-pattern dial as a tribute to the sea

  • Exceptional readability with Super-LumiNova hands & indexes

  • Powered by the Calibre 8800 Master Chronometer, delivering precision, resilience, and magnetic resistance

  • Professional-grade 300 m water resistance with helium escape valve

⚜️ Conclusion
The O Seamaster Diver 300M is not just a watch you wear — it’s a legacy you carry. A signature of leadership, performance, and style, it reflects the spirit of those who embrace challenges with grace and command presence in every room.

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