<p>[product_description]Since 1993, the Seamaster Professional Diver 300M has enjoyed a legendary following. OMEGA’s 21st century models stay true to the original’s dive watch design, while introducing exciting new materials and movements.
This 43.50 mm model, cased in black ceramic [ZrO2] and Sedna™ gold, has a black ceramic dial with laser-ablated waves in positive relief. The polished Sedna™ gold indexes and facetted hands, filled with white Super-LumiNova, contrast beautifully with the black dial. Completing the look is an integrated black rubber strap with black ceramic buckle.
The polished-brushed oriented caseback with wave-edged design features OMEGA’s patented NAIAD LOCK. Powering the watch is OMEGA’s Co-Axial Master Chronometer Calibre 8806.
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• MOVEMENT: Self winding
• CALIBER: Omega 8806
• DIAL COLOR: Black
• STRAP MATERIAL: Rubber strap
• STRAP CLASP: Ceramic
• STRAP CLASP: Pin buckle
• CASE MATERIAL: Black ceramic
• CASE SIZE: 43.5 mm
• CRYSTAL TYPE: Domed scratch‑resistant sapphire crystal with anti‑reflective treatment on both sides
• WATERPROOF: 30 bar (300 metres / 1000 feet)
• WARRANTY: 5 Years
• BETWEEN LUGS: 21 mm
• LUG‑To‑LUG: 51.5 mm
• THICKNESS: 14.5 mm
• Rubber
• STRAP UNDERSIDE: Rubber

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• Power Reserve: 55 hours
• Anti-magnetic: The movement is unaffected by exposure to strong magnetic fields, even those greater than 1.5 tesla (15,000 gauss).
• Chronometer: Label given to a watch which has undergone precision tests and received a certificate from an official body (COSC).
• 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.)
• Screw-in crown: Self-locking crown, screwed into the tube of the case, used for highly water resistant divers' watches.
• Transparent caseback: A transparent caseback - 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.
• Master Chronometer: Guaranteeing the Swiss industry’s highest standard of precision, performance and magnetic-resistance, as set by the Swiss Federal Institute of Metrology (METAS).

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