Speedmaster Moonphase Co-Axial Master Chronometer Chronograph 44.25mm

Model #: 304.

Mens Watch | Automatic Movement

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Watch Specifications

Brand Omega
Series Speedmaster Moonphase Co-Axial Master Chronometer Chronograph 44.25mm
Model Number 304.
Size Mens
Case Material Ceramic
Dial Colour Blue
Bracelet/Strap Alligator/Crocodile Leather Blue
Clasp Push Button Deployant Buckle
Movement Automatic
Bezel Fixed
Screw-down Crown No
Crystal Scratch Resistant Sapphire
Case Back Transparent
Water Resistance 100m/330ft
Diameter 44.25mm

Watch Description

Blue Side of the Moon

Brushed finished blue ceramic case with polished finished beveled corners.

Polished blue ceramic bezel with satin finished Liquidmetal Tachymeter scale.

Polished blue ceramic crown & chrono buttons.

Polished blue zirconium oxide ceramic dial, with [ZrO2] engraved on the dial directly above the center hands.

Applied index hour markers with luminescent fill.

Printed white minute/seconds & fractions of a second track.

Polished hour & minute hands with luminescent fill.

Small continuous running seconds hand at the center of the sub-dial at the 9 o'clock position.

Date displayed on the perimeter of the sub-dial at the 9 o'clock position, indicated via the red circular tipped hand.

Chronograph Stopwatch functions:

Large central seconds hand counter with luminous spear-head tip .

Minute (steel) & hour (white) hand counters are combined into a single sub-dial located at the 3 o'clock position.

Moonphase display sub-dial at the 6 o'clock position. The moonphase features two infinitely small yet photo-realistic moons on a metallic crystal disc microstructured to obtain a high resolution image of the moon.

Omega Master Co-Axial caliber 9904, beats at 28,000 vph (4Hz), contains 54 Jewels & has an approximate power reserve of 60 hours, courtesy of its twin barrels mounted in series.

Swiss Federal Institute of Metrology (METAS) certified Master-Chronometer. The finished watch movement is a COSC chronometer, passes tests that replicate real-life wearing conditions. The METAS certification tests water resistance, precision and magnetic resistance to 15'000 gauss.

Anti-magnetic: resistant to magnetic fields greater than 15'000 gauss.

The movement features Omega's "Si 14" silicon balance spring, which contributes to the movements outstanding resistance to shock and to environmental disturbances and thus to the watch’s chronometric performance.

The movement also features Omegas Co-Axial Escapement which contributes to greater precision, stability & durability. The Co-Axial escapement has less friction & reduces the necessity of lubrication thus reducing the time intervals required between servicing.

The rotor & visible bridges are decorated with a unique "arabesque" wave design finish.

This Watch has an alternate part number:

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