The iconic Omega Speedmaster Moonwatch Professional "Sapphire Sandwich" (reference 310.30.42.50.01.002). This is a modern iteration of the legendary chronograph that accompanied astronauts to the moon, now featuring the exquisite display of a sapphire crystal both on the dial side and the case back, hence the "Sapphire Sandwich" nickname.

This Speedmaster boasts the classic 42mm stainless steel case, the hallmark black dial with the chronograph sub-dials, and the tachymeter scale on the bezel.

However, this model elevates the experience with the sapphire crystal, offering a clear view of the beautifully finished Omega Calibre 3861. This manual-winding movement is a Master Chronometer certified, ensuring exceptional precision, performance, and magnetic resistance. 2  

Key Features:

• 42mm stainless steel case.

• Black dial with chronograph sub-dials.

• Tachymeter scale on the black bezel.

• Sapphire crystal on both the dial and case back ("Sapphire Sandwich").

• Omega Calibre 3861 manual-winding movement.

• Master Chronometer certified.