Speedmaster Moonphase Aventurine Master Chronometer Chronograph

From the retailer listing

Journey to the blue side of the moon The Speedmaster is one of OMEGA’s most iconic timepieces, having been a part of all six lunar missions. Taking the spirit of exploration a step further, this "Blue Side of the Moon" takes its names from the color 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