Shopping Cart

0

Your shopping bag is empty

Go to the shop

O Speedmaster Ref# 310.30.42.50.01.001

$1,705.00 $349.00

O Seamaster Diver 300M – Co-Axial Master Chronometer 42 mm 🔹 OverviewSince its debut in 1993, the O Seamaster Diver 300M has become a symbol of bold elegance and technical mastery. Worn by explorers, professionals, and legends alike, this timepiece redefines the balance of heritage and innovation — beneath the...

Special Offer

  • In Stock
  • Free delivery available*
  • Sale 30% Off Use Code: Deal30

Real time Visitor right now

sold in last Hour

HURRY! ONLY LEFT IN STOCK

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

    All orders shipped with UPS Express.

    Always free shipping for orders over US $250.

    All orders are shipped with a UPS tracking number.

Returns

    Items returned within 14 days of their original shipment date in same as new condition will be eligible for a full refund or store credit.

    Refunds will be charged back to the original form of payment used for purchase.

    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.

Help

Give us a shout if you have any other questions and/or concerns.

Email:

Phone: +1 (23) 456 789

Ask a Question

O Seamaster Diver 300M – Co-Axial Master Chronometer 42 mm

🔹 Overview
Since its debut in 1993, the O Seamaster Diver 300M has become a symbol of bold elegance and technical mastery. Worn by explorers, professionals, and legends alike, this timepiece redefines the balance of heritage and innovation — beneath the waves and beyond expectations.

💎 Sophisticated Strength in Every Detail

  • Case: 42 mm stainless steel — robust yet refined for modern explorers

  • Bezel: Blue ceramic with white enamel diving scale — durable and engineered for clarity

  • Dial: Sun-brushed ceramic, laser-engraved with O’s signature wave pattern — a tribute to oceanic rhythm

  • Hands & Indexes: Rhodium-plated, filled with Super-LumiNova for maximum legibility in darkness

  • Helium Escape Valve: Conical design, an O hallmark — symbol of genuine diving DNA

Precision at Its Core

  • Movement: O Co-Axial Master Chronometer Calibre 8800

  • Certification: METAS Master Chronometer, resistant to magnetic fields up to 15,000 gauss

  • Power Reserve: ~55 hours

  • Display: Sapphire crystal caseback showcasing movement

  • Water Resistance: 300 m / 1000 ft — trusted for true diving performance

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

Conclusion
The O Seamaster Diver 300M is more than a diving watch — it is a legacy of exploration, fearless innovation, and iconic design. Crafted for the deep, designed to endure, and made to inspire, it embodies precision, resilience, and elegance in every detail.

More Infomation To You

Things you need to know

We use industry standard SSL encryption to protect your details. Potentially sensitive information such as your name, address and card details are encoded so they can only be read on the secure server.

  • Safe Payments
  • Accept Credit Cart
  • Different Payment Method
  • Price Include VAT
  • Easy To Order

Express Delivery

  • Europe & USA within 2-4 days
  • Rest of the world within 3-7 days
  • Selected locations