The Speedmaster is one of OMEGA's most iconic timepieces, having been a part of all six lunar missions. Celebrating that history, this "Blue Side of the Moon" model takes its name from the colour of the dark blue sky. The 44.25 mm chronograph features a blue ceramic case complemented by a blue ceramic bezel ring with an OMEGA Ceragold tachymeter scale. It is presented on a blue leather strap with a blue ceramic and ceramised titanium foldover clasp. Most vividly, the dial is blue aventurine glass and includes 18K Sedna gold indexes and hands as well as a date hand with red tip. At 6 o'clock is the accurate Moonphase indication, which features a blue enamel aventurine glass Moonphase disc (patent pending) with near and far sides of the moon in Sedna gold. Powering the timepiece is the OMEGA Master Chronometer Calibre 9904, certified at the industry's highest standard by the Swiss Federal Institute of Metrology (METAS).