This Omega Speedmaster Moonwatch Professional Co-Axial Master Chronometer Chronograph 42 mm is a special variant crafted in solid 18K Moonshine™ Gold with a striking sun-brushed green dial.

The 42mm case, bracelet, and deployant buckle clasp, are all crafted from Omega's proprietary 18K Moonshine™ Gold. This alloy offers a paler hue than traditional yellow gold and resists fading over time.

The watch has a sun-brushed green PVD "step" dial paired with a matching green ceramic bezel ring. The bezel includes an 18K yellow gold Ceragold™ tachymeter scale featuring the historic "dot over 90" (DON) detail. 

The watch is powered by Omega's Calibre 3861, which is a manual-winding chronograph movement featuring a Co-Axial escapement. It is METAS certified as a Master Chronometer, resistant to magnetic fields up to 15,000 gauss, and delivers a 50-hour power reserve. 

The crystal is a "Sapphire sandwich" configuration with scratch-resistant sapphire crystal on the front and an exhibition caseback which is engraved with black text reading "FIRST WATCH WORN ON THE MOON". 

The watch also has 50 metres (5 bar / 167 feet) water resistance. 

This particular model has is in good condition but does shown signs of careful wear (please see photos as part of the description). The watch is offered as a full-set comprising of outer cardboard box, fabric inner box with velcro straps, picogram and master chronometre cards, international warranty card dated July 23, which means the watch remains under full manufacturer warranty until July 28. The watch also comes with a black rubber strap with 18k gold deployant clasp.