Omega Speedmaster Racing Co-Axial Master Chronograph Watch - 44.25 mm Steel Case - Black Ceramic Bezel - Matt Black Dial - Black Micro-Perforated Leather Strap - 329.32.44.51.01.001 Base 5 mm brown ceramic case

5 mm brown ceramic case with helium escape valve

champagne concentric circle dial

screw-down back

transparent back set with a yellow gold central Observatory medallion

center seconds and date

Omega Speedmaster Racing Co-Axial Master Chronograph Watch - 44.25 mm Steel Case - Black Ceramic Bezel - Matt Black Dial - Black Micro-Perforated Leather Strap - 329.32.44.51.01.001 Base 5 mm brown ceramic case44. 25 mm stainless steel case with antimagnetic design, transparent back, black ceramic bezel with tachymeter scale in orange wording and liquidmetal scale, domed scratch resistant sapphire crystal with anti reflective treatment on both sides, matt black dial with racing style minute track, caliber 9900 self winding Co Axial master chronometer movement with chronograph and date functions, approximately 60 hours of power reserve, black micro