Since 1993, the Seamaster Professional Diver 300M has enjoyed a legendary following. This 44 mm chronograph is a Numbered Edition model and is built from grade 2 titanium, 18K Sedna™ gold and tantalum, which can be found on the base of the bezel and the middle links of the bracelet.

The 18K Sedna™ gold bezel ring features a laser-ablated diving scale, while the polished blue ceramic [ZrO2] dial is distinguished by laser-ablated waves, a date window at 6 o’clock, and subdial rings with touches of 18K Sedna™ gold.

The side of each case includes an 18K Sedna™ gold plate engraved with each unique Numbered Edition number. Turning the watch over reveals an OMEGA Seahorse, which has been laser-engraved and lacquered white on the sapphire crystal. Through the glass, you can see the OMEGA Co-Axial Master Chronometer Calibre 9900, certified by the Swiss Federal Institute of Metrology (METAS).

Calibre Omega 9900: Self-winding chronograph with column wheel and Co-Axial escapement. Certified Master Chronometer, approved by METAS, resistant to magnetic fields reaching 15,000 gauss. Silicon balance-spring, 2 barrels mounted in series, time zone function. Central hour, minute and chronograph seconds hands, small seconds hand, 12-hour and 60-minute recorders. Rhodium plated finish with Geneva waves in arabesque.

FEATURES

Anti-Magnetic: The movement is unaffected by exposure to strong magnetic fields, even those greater than 1.5 tesla (15,000 gauss).

Automatic Watch: A self-winding watch or automatic watch uses a mechanical movement whose main spring is wound automatically by the natural motion of the wearer’s arm.

Chronograph: The chronograph function is a mechanism for measuring time intervals. A chronograph watch can therefore be used to time events while displaying the time like any traditional watch.

Chronometer: Label given to a watch which has undergone precision tests and received a certificate from an official body (COSC).

Date: The day of the month, displayed in a window on a watch dial at the 3 or 6 o’clock position, or within a subdial at 9 o’clock.

Helium Escape Valve: Decompression system which allows helium to escape from inside the watch when the watch is worn for professional use in pressure chambers. (Long-term underwater work, crude oil exploration, etc.)

Master Chronometer Certified: Guaranteeing the Swiss industry’s highest standard of precision, performance and magnetic-resistance, as set by the Swiss Federal Institute of Metrology (METAS).

Numbered Edition: A watch series each of whose pieces is numbered sequentially in the order it is produced.

Screw-In Crown: Self-locking crown, screwed into the tube of the case, used for highly water resistant divers’ watches.

Sedna Gold™: Sedna Gold™ is an 18K rose gold alloy, fusing pure gold with copper and palladium, in order to guarantee that your gold watch has long lasting lustre.

Small Seconds: A hand on a sub-dial which tracks seconds typically it completes a full rotation in one minute.

Titanium: A highly stable, lighweight and hard metal used for cases and bracelets. OMEGA titanium watches are made of grade 2 and grade 5 titanium. Grade 5 offers a brighter grey color than grade 2 and can be polished more easily.

Transparent Case Back: A transparent case back – frequently made of sapphire – makes it possible to see the movement inside the watch.

Unidirectional Rotating Bezel: A bezel which turns in only one direction. Particularly useful for divers who cannot accidentally rotate it in the wrong direction, which could cause them to miscalculate their dive times. A rotating bezel makes it easy to measure elapsed time.

TECHNICAL DATA

Between lugs
21mm

Bracelet
Titanium ? Tantalum ? Sedna™ Gold

Case
Titanium ? Tantalum ? Sedna™ Gold

Case diameter
44mm

Dial
Blue

Crystal
Domed scratch?resistant sapphire crystal with anti?reflective treatment on both sides

Water resistance
300 Metres

Specifications